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(Noun): the bonus anal sex you give your man after he's been extra good to you. Combination of bonus and anus as well as boner and anus.
Guy- "I was so good to her this week she gave me some surprise bonanus"

Girl- "if he wants anal from me he's gonna have to earn it. Get some bonanus"
Bonanus by ThatWasTheWorst May 26, 2018
Related Words
Bo-na-nus, (n.) - The boner that pokes through the anus. (See picture of Tyrannosaurus Rex skeleton for example)
My bonanus was poking through my cheeks at the gym last night.
Bonanus by Futuremaestro March 18, 2019

Boyanusport 

locals' term for the Cape Cod town of Provincetown, a resort community with a large gay population, both residents and visitors.
I spent the long weekend on the Cape at Boyanusport, and was that big fun!
Boyanusport by flyingdog February 28, 2008
The little brown part at the bottom of a banana that no one in their right mind eats.
Only monkeys eat the bananus.
bananus by thlayli February 1, 2003
Simple combination of Butt, and anus. Cute way of saying "your an asshole", but to a loved one like a

bf or gf.
Gf: "Honey did you remember that it's my birthday today?" Bf : "oh what? really?" Gf: "how could you forget?" Bf: "im joking baby," *pulls out flowers* Gf: "your such a bnanus"
bnanus by shaduu November 8, 2017
Making a bet involving shoving a banana up your ass and losing but following through on that promise nonetheless.
May 25,2021 u/Rick_Of_Spades made a bet on r/Superstonk that if GME closed above $200 he would shove a banana up his ass🍌🍑.

GME closed above $200 and he delivered on his promise shoving a banana into his bananus.
Bananus by u/Patty8mack June 18, 2021