Verb: To wank.
Noun: A wank.
Both uses are a slightly more pleasent version of the word. Which can be used in polite converstation without causing offense.
As defined in that lecture along with: zig and ziga.
I'm off for a ziga-zigah.
Hey Joe, your a ziga-zigah.
Last night Sue and Jeff were totally ziga-zigahing each other.
I'm sure Sarah has never ziga-zigahed...