The act of anything Thomas-like or Tom-like that hurts others. Tomshit also includes selfish narcissistic tendencies.
Tomshit examples include: Tom Cat; having sexual intercourse and relationships with more than one partner; tomfoolery; messing around, Doubting Thomas; thinking everyone else is an idiot, Tomming around; cheater, Tom Thumb; sticks in his thumb and three fingers for his own self gratification; Tom Turkey, male jerk; Peeping Tom, out right pervert, especially enjoys inappropriate porn.
by Totally The Expert September 2, 2011