Used as a nonsenseresponse to threads on the "Lost" iMDB message boards not deemed worthy of a proper reply. Variations include: Mopless Kevin, Lifeless Locke, Waltless Michael, Caneless Nestor.
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!"
Any male who goes shirtless in public events such as concerts or parties. Usually drunk. Most often wearing inappropriate shorts or cut offs. Varying styles of facial hair and is always tanned or sunburned. Most often seen with a mullet. Always a complete fucktard.
We were all having a good timewatching the band until that shirtless wonder showed up and started hollering and dancing in front of the stage.