cumlaugh Share definition Flag When a guy is getting a handjob, reaches climax, and laughs at the same time, making a ridiculous face because he's unable to laugh. Last night I thought it would be funny to watch my boyfriend cumlaugh, he didn't think so. cumlaugh by sexinthechatroom May 13, 2011 0 0 Get merch Get the cumlaugh mug. Buy Now — $32.95 See more merch