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1.
n. generic insult meaning any stupid individual. It has it origins in Mike Judge's siminal cartoon "Beavis and Butthead". See also "Fart Knocker", "Ass Munch", and "Dillweed/ Dill Hole".
Shut up, fart goblin.
by Psycho Miko April 25, 2006
 
2.
A large brown log (usually known as shitturdpoopoopand shite which pops out of your anal passage when you fart loudly.
Fuck me mate I farted yesterday and got attacked by a hugh fart goblin!
by Beavis_rfc May 27, 2005