donkey punchのようなどんな単語でも探してください。
it is the short way of saying masterbate. it can also be said as m.bating as in masterbating.
my mom caught me m.bating.

i m.bate all the time.
randoによって 2005年09月15日(木)
Short for masturbate

Others, (mbating; masturbating) and (mbated; masturbated)
Should I mbate or kill myself today? :-)
whirraによって 2013年07月02日(火)