I researched everything that showed a bit of skin on the males and put it all together in one spot for easy reference for you.
While most of these do have full sets, I am only listing those items that have a skimpy appearance on the males and discussing a little of what got them on the list. Legs will be found separately at the bottom of each armor type post.
May you ever be fashionable, and as covered (or un-covered) as you desire. ;)
As always, if I am missing a design, color or alternate way of acquiring something, please let me know and I will happily add it! <3
The guide for the Ladies can be found here: http://us.battle.net/wow/en/forum/topic/3053956119
Plate Chest Options
Starting off with the one design in plate that is skimpier on males than females, a bit of a harness-y look with chain accents; In grey Stormforged Breastplate, Gateshattering Hauberk, Rough Stone Carapace, and Troggzor's Crystalline Plate. In dark grey Druidic Guardian Plate, Chestplate of Exceptional Expectations and Oddly Revealing Chestguard. In green Jasperlode Breastplate, Direforge Breastplate, Fargodeep Breastplate, Stonewrought Breastplate, Crystalvein Breastplate, Dreadmaul Breastplate, and Rethban Breastplate. And in blue Damplight Chestplate, Chestplate of Fragrant Desire, Chestguard of Cognitive Dissonance, and Chestguard of Alarming Dreams.
Then we have some nice side and back exposure with this skin; In grey Slatesteel Breastplate or Heroic Armor, in gold Flamebane Breastplate, in gold/grey Heavy Earthforged Breastplate, in green Fel Iron Breastplate, in black Thick Obsidian Breastplateand in brown/red Breastplate of the Warbringer.
These sets allow you to display those rock-hard abs perfectly. In black Tarnished Plate Chestpiece, in silver Grimscale Armor and in gold Shattered Hand Breastplate.
Over here we have a bit of belly-button showing, and a generous amount of lower back exposure. In gold Conqueror's Breastplate, in blue Hydralick Armor and Ornate Mithril Breastplate, and in red Bloodscale Breastplate and Gilded Crimson Chestplate.
These jagged tops leave the midriff mostly bare, save for a spike in the front and back. In black Drakescale Breastplate, in blue Warleader's Breastplate and Adamantite Breastplate, in brown Brutish Breastplate and in black/gold Exalted Harness.
Some bareness at the waist and sides here, save for a few straps. In gold Bloodfist Breastplate, in red Demon Forged Breastplate, Boulderfist Armor and Darkcrest Breastplate and in silver/gold Truesilver Breastplate.
A bit more coverage than the previous tops, these still offer a bit of belly and side exposure. In blue/red Lost Chestplate of the Reverent, Soul Saver's Chest Plate and Runic Breastplate, in blue/gold Chestguard of Illumination and Templar Chestplate, in purple Revenant Chestplate, Murkblood Avenger's Chestplate and Chestplate of A'dal, in green Ironvine Breastplate and Emerald Breastplate and in red Thorium Armor.
These tops leave a generous amount of back and sides bare, dipping in the front to frame the belly button perfectly. In red/gold Hyperion Armor, in a rosy brown/orange Commander's Armor, in white/purple/red Scavenged Breastplate and Imbued Plate Armor and in a silver/gold/black Enchanted Thorium Breastplate.
These styles are fairly borderline skimpy, but the expanse of lower back showing has me include them. In black/red The Exarch's Protector, in green/gold Silithid Carapace Chestguard, in black/grey Spiderfang Carapace and in brown/blue Breastplate of Retribution.
This skin leaves most of the upper back bare, with some wonderful strap accents. In red Warmaul Breastplate and Warlord's Iron-Breastplate.
A nice midriff-baring style here; In grey Chromite Chestplate, a soft orange Embossed Plate Armor, silver Field Plate Armor and in blue Jouster's Chestplate.
Ending off the tops with a few single options; A plate harness Durotan's Battle Harness. A belly button-baring gold top Khan'aish Breastplate. And a wonderfully skimpy option that leaves those pecs and upper back exposed Talonguard Armor.
Plate Leg Options
There be....one. Really, just one. =/ WTB a few more options please, Blizz!
Skyfire Greaves is the only leg that varies from the standard waist-high and ankle or knee lengths. It is very, very low cut and a nice, slim belt such as Belt of the Fallen Emperor or Royal Qiraji Belt will not cover that up.