Crab

So a guy buys a $5 hooker.....

They have sex and the next day the guys realizes he has crabs. The guy goes back the next day to complain and demand a refund

The hooker goes "It was only $5, what did you expect? Lobster?"

Which one is the odd one out; a Crab, a Tuna, a Chinese man run over by a bus or a Lobster?

A tuna, because the rest of them are crustaceans.

What's it called when a crab is walking to it's part time job?

A side hustle.

My wife's star sign was cancer and it's quite ironic how she died really...

She was attacked by a giant crab.