This can be defined in many ways.  One of those being a person that steals your kill.  That is the most basic, but there is also a person that comes in after a battle and pumps about one round of SMG into you and you die.  Another definition of mooch is a person that takes all of your answers and somehow ends up getting a better grade than you.
Mooch:n:The biggest noob that every one hates and needs to learn to play a game as a legit person or just get your ass off of the game.
Mooch:n:The biggest noob that every one hates and needs to learn to play a game as a legit person or just get your ass off of the game.
"You goddamn mooch!!!! I shot you like ten thousand times!!"
"Uh oh here comes _______ hes gonna kill you with the ultimate noob combo"
"I swear if you mooch this kill I wil rape your ass so hard that you will never return to this game again!"
"Uh oh here comes _______ hes gonna kill you with the ultimate noob combo"
"I swear if you mooch this kill I wil rape your ass so hard that you will never return to this game again!"
by spence aka. LiveBlue93 December 2, 2007
 Get the Moochmug.
Get the Moochmug. Person A: So I played against Mooch last night.
Person B: Oh yeah? How'd that go?
Person A: Well, you know, it's Mooch. So I stood no chance.
Person B: Oh yeah? How'd that go?
Person A: Well, you know, it's Mooch. So I stood no chance.
by KGB4EV3R July 15, 2011
 Get the Moochmug.
Get the Moochmug. Mooch is Raw
by MoochisRaw January 24, 2011
 Get the Moochmug.
Get the Moochmug. by Noodle January 16, 2005
 Get the moochmug.
Get the moochmug. "Hey, I thought you just started working at a Fast Food Restaurant what happened?"
"Boss caught me taking a leak in the jar of pickles and I got mooched."
"Boss caught me taking a leak in the jar of pickles and I got mooched."
by louiseharp July 31, 2017
 Get the Moochedmug.
Get the Moochedmug. Someone who takes and takes but never gives. They could take food, money or anything that you give them but never give you anything in return.
by KelKell August 22, 2009
 Get the moochmug.
Get the moochmug. A scab or freeloader who comes to your house uninvited and overstays his welcome (For more than about 3 days) and proceeds to eat all your food, stink up your bathroom, take all your drugs and just generally leech all the blood from your body during their stay.
"Don't let John in again, he is the biggest moocher." 
"Your'e not coming over if your'e going to mooch again!"
"Your'e not coming over if your'e going to mooch again!"
by Anonymous July 9, 2003
 Get the moochmug.
Get the moochmug.