origin: garfunkle of Simon and Garfunkle.
similar to fuck. it has many definitions and can be used interchangeably. it can be used as a synonym for pissed, shit (or the past tense of shit: shat), cum (came). it can also be used as an interjection to express emotion, similar to FUCK YEAH!
-Katie was so awesome that i Garfunkled in amazement.
-Alex, and Drew were so scared from the horror movies they would scream GARFUNKLE! everytime something popped out.