a knee-slapper

Like this video? Subscribe to our free daily email and get a new idiom video every day!

a knee-slapper

A hilarious joke, especially one that evokes loud and prolonged laughter. My uncle told me a real knee-slapper the other day! Do you want to hear it?
References in periodicals archive ?
(How was Michael Barone overlooked?) Boy, was this a knee-slapper, punctuated by overly forced guffaws, darting glances, and seat-squirming so characteristic of those who doth protest too much.
In other words, blame it on "Joseph's confiscatory tax policy." What a knee-slapper. This sort of thing must have passed for humor among the founding fathers of the supply-side movement as they knocked back their cocktails.
None of the rest of us in the class considered the anecdote a knee-slapper, but we understood what he meant.