They're All Gonna Laugh at You! is an album by American comedian
Adam Sandler, released in 1993. The title
ostensibly comes from a repeated phrase in the 1976 horror movie Carrie, and from a repeated line in the "Oh Mom..." track that appears on the album.
That's the official definition, but you can also use it to confuse someone, or if you don't want to bother thinking about something else to say. It replaces wit, basically.