Cut the Malarkey!
This is a Biden meme. In this meme, they are making fun of Joe Biden. The humor stems from the fact that Joe Biden has claimed to have met, got into a disagreement with, and then befriended a gangster named Corn Pop back when he was a lifeguard.
They are also making fun of the way that he talks.
The reason why this is funny is that insulting people is funny, and also that Corn Pop is a surprising name for a gangster.