A rather large/husky, aggressive and loudwoman who cannot control her liquor well and creates an unwanted presence for all of those at the party.
The most likely reason for this brutish behavior is a jealous self-hatred of herself for not getting attention (laid) and thus cockblocks everyone in her vicinity.
I was hitting it off with a cute girl at a party until a huffalumpagus came up to us and burped in our faces and asked if we had any beef burritos.
The cousin of the heffalump (a fictional creature from Winnie the Pooh). They are closely related, however they differ in that the humpalump prefers close contact with other humpalumps at all times, where as the heffalump is rather shy and keeps to himself.
Bobby: Mommy, why won't that humpalump get off the other one? What are they doing?
Mom: Oh Bobby, I'd rather you didn't watch that. Go look at the heffalumps. They're much more kid friendly.