When he isn't showing us videos of people barfing or getting punched in the face by boxing champs, Daniel Tosh is apparently slipping some nips during his show Tosh.0

John Riggs posted a video on YouTube of a Tosh.0 episode he had recorded on his DVR. Right before the show cut to a commercial there was a 'blip' on the screen. When Riggs slowed his DVR down to a shot-by-shot speed, the blip turned out to be a picture of a man's nipple.

Subliminal advertising a method where advertisers try to slip in hidden messages that may flash on a screen. I'm not sure what Tosh was trying to promote with the nipple flash, but its not surprising since he is (or almost) naked in almost every episode for apparently no reason.