Top Definition
A very specific time of the night when the crazy drunk boys you're hanging out with decide to remove their shirts seductively, yelling, "Does anybody know what time it is...? o yah!!! its shirtless o'clock!"
All the boys shouted, "It's shirtless o'clock!"
by Shayna007 August 21, 2006

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Smooth, soft, slim fit American Apparel shirt. Custom printed. 100% fine jersey cotton, except for heather grey (90% cotton).

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