knee-slapper

He loved pickle jokes and eventually collected them in a pamphlet, “Bob Vlasic’s 101 Pickle Jokes,” the cover of which featured a gunslinging, cowboy-hatted gherkin and this salty knee-slapper: “Who’s the toughest pickle in Dodge City? Marshall Dill.”

And if you need a knee-slapper to seal the deal, the market has historically outperformed real estate as far as returns go, making investing rather than buying the better personal finance choice.

That was hilarious for a number of reasons, but not as much of a knee-slapper as Biden's zinger response: "Abraham Lincoln here is one of the most racist presidents we've had in modern history."

This must be a real knee-slapper to the virus.

And how about this knee-slapper?