1. Any slow, overpriced, piece of shit computer made in china that crashes for any reason. So delicate and frail that if you get a drop of water on it or get a strain of hair in the keyboard it will begin to have a severe seizure and most likely never work again.
2. Any piece of hardware so useless you might as well wipe your anus with it.
3. An excuse to steal your money.
Guy 1: Awe man! My computer crashed again! Do you knowwhat's wrong with it?
Guy 2: Oh there's nothing wrong with it, its just a Toshitba!
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.