Garcasm is a play on the word Sarcasm. It is used when replying in a negative mannor. The word 'Garcasm' comes from the words 'Good' and 'Sarcasm' = Garcasm. The letter 'g' can replace the letter at the beginning of any word to turn it negative. For example:
Nathan: What do you call a man with brown paper trousers?
Max: ???
Nathan: Russell
Max: Well that was a goke.

ie goke means good joke, therefore telling Nathan that it was a shit joke, therefore was sarcasm, but as it was not good sarcasm he sais garcasm.

Also this defines the word probs as Max could then say "that joke was probs funny"
by Garcasm101 January 16, 2010
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benign sarcasm not meant to be rude but to poke fun at a friend;good+sarcasm=garcasm
person1: hey dude did you get the keys from the car
person2: "NO,I INTENTIONALLY LEFT THEM IN THE IGNITION AND LOCKED MY SELF OUT JUST TO SPITE YOU!"
Person 1 and 2: Lol

person1: your garcasm is awsome, no one can top u at it
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