Short for "Taari Garn, Benchod". Used in similar English language situations as "Oh Fuck Off". Predominantly in a more light hearted way during banter with friends but can also be used in a more serious situation where it is more offensive.
Spelling differs on pronunciation of the middle world. Sometimes seen as "Gaarn" "Gaand" "Gand" 'Garn". The acronym still remains the same.
Literal English Translation "Your Ass, SisterFucker"
Boss: Are you so bored you're pressing plmoknijbuhvygctfxrdzeswaq again?
Dave: No, it's worse
Boss: `1234567890-=qwertyuiop\asdfghjkl;'zxcvbnm,./~!@#$%^&*()_+QWERTYUIOP{}|ASDFGHJKL:"ZXCVBNM<>? is that it?
Dave: No, \'/=;.-pl,0okm9ijn8uhb7ygv6tfc5rdx4esz3wa2q1`~!QAZ@WSX#EDC$RFV%TGB^YHN&UJM*IK<(OL>)P:?_{"+}| is what I'm typing.
Boss: Wow, you're really bored.
Dave: I'm always bored.
Boss: Why don't you get another job?
Dave: I got all F's.
Boss: Oh, that makes sense.
The combination of letters made by going from the middle-left of a standard qwerty keyboard to the left and then from the middle-right to the right. This is something that a person types when the person has went through Boredom Heaven and Boredom Hell and is trying to become the Boredom God.