1 definition by Slapmeharder

Noun

1 Violent masturbation session, particularly when depressed or hungry.

2 Vigorous post-workout masturbation in any gym's changing room or showers.

Verb

To bring ones' self or another male to orgasm following, or sometimes during, a workout in the gym
- "I've really worked up a sweat on the treadmill, I'm gonna go tonk in the

showers while my hands are still naturally lubed up".

- "Alright mate, fancy a quick tonk to relax after pumping these weights?" (N.b:

the verb "to pump" is often used as a double entendre as it can refer to both

weight-lifting and intense masturbation, hence rendering superfluous the use

of the actual word "tonk").

- "God, I hate having to clean these showers. So many guys tonk themselves

silly after they've finished working out, some of them leave a right mess!".
by Slapmeharder June 24, 2014
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