a player in a FPS (or any other multiplayer game which involves fast action and guns) who sits back as other players duke it out in a firefight, and makes an appearance after the victor of the duel is left with a little amount of health and kill him/her for an easy kill. Much like a janitor cleans up after a mess.
Dude, its no fun playing Halo with you anymore because all you do is janitor with your assault rifle.
by AltCoder April 30, 2005
Get the janitormug. a creepy person at your school that cleans up after you. In reality, he is pedophile. After school, he fellates children in the bathroom, hardcore. He also makes out with other janitors and masturbates with children.
Kid 1: We gotta get out of here before the doors of the school close.
Kid 2: Yeah! The janitor's a real pedo!
Kid 2: Yeah! The janitor's a real pedo!
by neversaymyname June 07, 2011
Get the Janitormug. 
A nickname given by (mostly oneself) others to a person who is professional in a particular game or sport.
Niko:So, Roman, why are these loan sharks after a fat slob of shit?
Roman:Cousin, they don't call me a fat slob of shit, they call me the Janitor and that is why they are after me, cousin.
Niko:And why is that?
Roman:Because I clean up(Awkward Laughter), get it? Janitor? Clean up the game? No?
Roman:Cousin, they don't call me a fat slob of shit, they call me the Janitor and that is why they are after me, cousin.
Niko:And why is that?
Roman:Because I clean up(Awkward Laughter), get it? Janitor? Clean up the game? No?
by deathcop4000 June 13, 2018
Get the Janitormug. a drunk internet team speak server admin who likes to feel important so he bans people and kicks them to make himself feel better because he has a very sad life outside of the internet and has to feel big on teamspeak...i hope they get drunk and get in an accident and Die...
hey speidel..u were making humming noises so im retarded and im going to ban you cause im peipers but buddy
by jok3r April 03, 2005
Get the janitormug. by cheuwuuw May 13, 2005
Get the janitormug. When someone (in a first person shooter game) appears at the last second and steals my kill because he somehow put the last bullet into the noob I've been shooting at.
In Halo 2 - when anyone steals your kill right before you were about to put the final bullet in someone's head or heart. Hence the name: Janitor = Anyone who comes in and cleans up the "crap" they never started.
by RAIN January 27, 2005
Get the Janitormug.