+ up 

has multiple different ways of being used within mmo circles.
1. "+ up"
2. "+" - the act of +ing up.
3. "plus up"

etc.

1. "+ up for party" - an invitation to get invited to party, usually responded to with "+" or "x"
2. "+" or "x" - the response to "1. "+ up"", shows that they want to be invited to the party.
3. "plus up" - phonetic spelling of "+ up", means the same thing.

+ up by ZaidiaBDO December 19, 2022

plussed up (+'d up) 

1. Being destroyed, humiliated, creamed, or otherwise suffering a loss from the hand of another person, group, or object.

2. Having physical, emotional, or psychological trama suffered.

Chris wrecked his motorcycle into a telephone pole. He was totally plussed up(+'d up).

J.P. was going to dunk the ball to impress a girl but was blocked. He was totally plussed up (+'d up).

plussed up (+'d up) by Chris Altherr October 9, 2008