While playing Mario Kart, you get shafted so bad and so many times, that you go from first to last and can't win the race.
Common symptoms of being Tom'd are: Losing horribly, throwing controllers, screaming at t.v., loss of respect, ridicule from friends, not wanting to play Mario Kart, and having to leave the house because its late and people need their sleep.
Jesse: No, no no no! Fu-fuck!! I just got shafted!!
Neil: No Jesse, you just got Tom'd.
Jessie: *throws controller* I'm done with this.
The unfortunate result of participating in a relationship with a womanizing bastard who habitually refers to you as a roommate or buddy even after years of being married or in a serious relationship. the act of being tom'd can lead to anger, dismay, denial, and ultimately complete and utter hatred and disgust for all men.
wife/girlfriend enters restraunt where "tom" is eating with a female
tom (to girl at table)- "have you met my roommate"
girlfriend - "we've been married for 4 years..."
girl at table - "damn girl you got tom'd big time"