To add members to, or become a member of, someone else's "
mafia."
Originally just
shorthand for joining/asking someone to join you in
Mafia Wars, it now includes real life situations.
(1) Bob:
Mob up! bob90210@hootmail.
org(2) Carl: Yo, those four guys have been messin' with us all night.
Dave: Well there's only the two of us, so if you wanna take 'em on, we're
gonna have to mob up.
