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1.
Munching your boyfriend's hairy asshole for so long you develop lockjaw.
Dude is assgobblin like a fizziend, suddenly he can't shut his mouth: "Dawwwm howwwney, Iww cawwn't clowwse mywww jawwwws."

Dude 2 "Too much assgoblin, baby, here let me rub your cheeks."
 
2.
A gobblin that originates from the ass. Usally used as an insult.
"Your an assgobblin."
by Jin Chaosus March 02, 2003