aftrekken

Etymology
From. The sense “to subtract” was coined by as a. Equivalent to.

Verb

 * 1)  to pull off
 * 2)  to subtract
 * 3)  to clean/level etc. with a squeegee
 * 4)  to wank, to jerk off, to give a hand job; to stimulate one's own or another person's penis using the hand.
 * 1)  to wank, to jerk off, to give a hand job; to stimulate one's own or another person's penis using the hand.