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1.
'glitch in the matrix'. used to describe internet and technological inconsistencies. can also be used to describe misunderstanding between people irl
me: what happened you went offline for a few seconds
you: i dunno what happened.. gitm
by chrysanthalbee July 30, 2008
 
2.
initialism for 'Get in that minge'. It does not necessarily mean to enter a womans' minge; rather, it can be used in the following ways:

1) An expression of excitement: it is appropriate to say it when a fitty walks past you, especially in the presence of friends, to ensure that she does not understand what you are saying.

2) To encourage your friend to talk to a girl: sometimes a girl will look at your mate but, instead, they're too nervous to make conversation; by shouting 'GITM' at your mate -- one letter at a time -- it will inject them with a sudden rush of confidence

3) More loosely: for when anything good happens!!!
1) She is dead gorgeous -- yeah, that girl that just walked past us -- GITM!

2) Mannn that girl is well into you, can't you see her looking at you?...GITM!

3) That was a banging goal...GITM!; GITM!...I've no work today because it's the weekend; GITM!...I just won the lottery!
by Robbie Masters March 12, 2010
 
3.
glitch in the matrix. used to refer to those events in which something goes wrong but is commonplace (esp. with technology). e.g. snafu 2.0
huggybear: what happened? your IM showed you as logged off.
bubbybear: i dunno. gitm
by chrysanthalbee August 27, 2008