Definitions by Frank G.

GM 

Good Mannered, a term most people use now a days online when they don't want stupid ass people going into their channels on B.Net going "YOU SUCK DICK..." etc. etc.

Player 1: Hi, are you GM?
Player 2: FUCK NO
Player 1: Oh, then I don't want to game with you sorry...
Player 2: STFU nerd!
Player 1: >kick Player 2 manner please
Player 1 has kicked Player 2 out of the channel.

GM by Frank G. November 20, 2004

BM 

Used commonly in online games such as StarCraft, WarCraft, etc.

BM is used when someone is of repeated annoyance and uses such bad language such as "Fuck you", "Damn you", "Shut the fuck up", "Go slit yourself", etc. etc.
In most cases people like this usually need a good kick and a warning.

Gosh, John is so BM. Yesterday he was observing one of my games and he went a fucking nuke rush on me...that is so BM..

Other Guy: Yeah, let's ban him from our channel cause he's done that to me and like 5 other people.

BM by Frank G. November 20, 2004

Stampin it Up 

The ridiculous notion that one must purchase stamping supplies from someone throwing a stamp party only to pay 5 times the actual value but then never use the product. Additional products may be purchased to add to the already costly habit. Neither the party bought supplies or store bought additions will ever be used. Eventually these items can be sold at a yard sale for 1/20 their original value.

Look a Gloria, she is stampin it up.

Stampin it Up by Frank G. April 23, 2003