A surreal dud, con or fraud.

Probably the most famous Monty Python sketch.
A customer returns to a pet shop where he was originally conned into buying a dead parrot.
Regardless of the extremes the customer goes to prove the parrot is dead (he even whacks the dead bird off a hard surface) the seller insists the parrot is as still as alive as it was previous.

Also known as the blue parrot sketch.

Got the covid-19 vaccine

A parrot that doesn't pass as a return in pet shops.

When a guy goes up behind another guy (or girl) that's sitting down and pulls out his dick and gently rests it on the sitting persons shoulder, thus creating a dead parrot.