To perform an exaggerated gesture of male masturbation with one's hand in the air in front of oneself. Meant usually as a insult to somebody to whom it is directed, or as a symbol of annoyance at something which has been said. See also am.

its when you pretend the air is a penis and then you just masturbate it. if you need help come and see me.

Air masturbation is when a woman sucks air in and out of her vagina or asshole to masturbate with it.