A fork of Rural Dictionary
To call claim is to express your belief that an exclamation is untrue. The act of calling claim is a challenge to the person to go through with the action, often one that is very ambitious or daring. The expression is often used to make a person publicly back down or bring light to the ambitious statement made.
Scott: Dude, am i fat? Friends: Yes. Scott: I'm going to come back from summer so jacked! Friend A: I call claim. Scott: *whiny voice* No, seriously...