Another name for your penis when you are too young to produce any sexual fluids that only air comes out when your masturbate.
Mike: I think the first time I jacked it I was like 13-14 years old.
Marty: Really?! I wacked off at 8. Only air came out though. No jizz.
Mike: I knew you had a tiny air cumpressor.
Marty: Really?! I wacked off at 8. Only air came out though. No jizz.
Mike: I knew you had a tiny air cumpressor.
by Uncle Gary's Potato Farm January 17, 2019