Crapstain
A sentence or series of idiotic, stupid, 'funny' and generally irrelevant comments which have no meaningful bearing on the conversation, and can often lead to a lot of taunting towards the person/s who said the sentence or comments.
Person: "Do you like cheese?"
Person 2: "Yes but I think you'll find it's much nicer when you rub it all over your body first"
Everyone else: "Oh my God that's such a crapstain!"
Person 2: "Yes but I think you'll find it's much nicer when you rub it all over your body first"
Everyone else: "Oh my God that's such a crapstain!"