自摸

自摸	zì mō	(mahjong) to self-draw the winning tile / (slang) to play with oneself; to masturbate
自	zì	(bound form) self; oneself / from; since / naturally; as a matter of course
摸	mō	to feel with the hand / to touch / to stroke / to grope / to steal / to abstract
摸	mó	variant of 摹