Yankin' your wang
A term used from one person to another to express that they are simply making a joke and are not serious.
Levi: Your mom is so hot, can I bang her?
Jaime: Excuse me?
Levi: Calm down, I'm just yankin' your wang.
Jaime: ...
Jaime: Excuse me?
Levi: Calm down, I'm just yankin' your wang.
Jaime: ...