to masturbate, jerk off, hug your horn, etc. etc.

1. Describes almost accuratly the sound that wanking off makes.
2. the motion your arm makes when wanking off.

Fwap is a slang term for male masturbation. The origin of the word is believed to be onomatopoeic, though may be an acronym (or equally likely, a backronym) for Furiously Wanking At Porn. It is in common usage amongst the b3ta web community.

The act of slapping woman/man with a slightly erect cock.

The act of hitting someone in the face with your penis. Derived from the sound it makes.

to smack incessantly with a fish; the highest form of physical insultation

1. Jerking off or calling someone else a jerk-off.

2. A motion made with the fist and forearm in a jerking manner.