There's a whole genre of these missing limb jokes, often puns.

What do you call a woman with one leg? Eileen

What do you call a man with a prosthetic toe? Roberto

What do you call a man with no arms and no legs lying on the ground? Matt

What do you call a man with no arms and no legs in the ocean? Bob

What do you call a cow with no legs? Ground beef

What do you call a dog with no legs? Doesn't matter what you call them, they aren't gonna come

How do you get a one-armed person out of a tree? You wave

Etc.