That crazy bitch that lives in the back of your head and only comes out when your super drunk, thus resulting in what is known as a blackout.
person 1 : dude, what happened last night ? I totally blacked out last night.
person 2 : Your party goblin was released.
When that Hawaii boy gets his fourth glass of Hennessy and there's no stopping him.
"Hey should we get another drink?"
"Not unless you want to meet the PARTY GOBLIN"
"When are we going home?"
"Well the party goblin has been unleashed so not until dawn.