UP can stand for UnderPowered, in contrast to OP, Overpowered. It is used mostly in RTS forums for indicating a weakness in a unit, civilization, ect.
The Chinese anti-cavalry units are way too UP, as they have nothing to counter the splash attack of French Gendarmes, please fix it mods.
by Drüd October 19, 2008

Forum:
Guy: Help me with this stuff!
-no replies-
Guy: up.
Comment on an Article:
I like it so up the damn quote already!
Guy: Help me with this stuff!
-no replies-
Guy: up.
Comment on an Article:
I like it so up the damn quote already!
by Akmaur February 7, 2007

(toe up) a word coming from ebonic roots meaning "torn up". Often times used in therapy terminology to refer to something that is torn up.
by william joseph hemmington December 21, 2004

Said of outspoken, autocratic persons that profess to always be right and boast about how they 'told somebody off'.
by Indiana Jones February 20, 2004

by farmpartyboy December 13, 2010
