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When a male receives a boner that does not all the way erect, or when coming down from an erection and is currently right in the middle stage of completely coming down from the that erection. Better understood to be a "soft boner."
Mike: Hey did you see that chick?
Aaron: yeah I did, shes ok I would give her a 5 out of 10.
Mike: She's good enough to give me a bifner I suppose.
Bifner by Vessey December 7, 2009
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n. Derived from the ancient Roman acronym "BFNR" meaning "Boner For No Reason". A bifner usually occurs in non-sexual situations without warning and can last indefinitely. There are various methods for removing the bifner but the best is giving it time.
Correct Usage:"The other day I was watching the View and I got a massive bifner."

"I was sitting in Math class and I got a bifner."

Incorrect Usuage:"Out of nowhere I got a bifner." The definition of bifner already covers the unexpectedness.
Bifner by Matt Greco July 31, 2006
Related Words
Bifner biffer bifter Binner bitner biner biener bignerrs binert bioner
Biflette is a French word for being slapped in the face with someone's dick.
The verb for it is "bifler". It's a sign of great disrespect.
"L'etudiant biffle son camarade"
"Bifler est ne pas respecter quelqu'un."
bifler by GeorgeDarwin August 7, 2019

binnered 

When something is fucked up thoroughly because of sheer incompetence.

Named after dumbass Sciz Rizz who got the nickname "Binner" from his fondness for plowing his hoopty into dumpsters and leaving the scene.
"Look at that tile work. It's all binnered up."
binnered by EatItJosh June 17, 2017
A Bifney is a human-like creature that lives in typical human households. You can often find wild Bifney’s underneath beds or inside closets. They may be seen as cute and innocent, but beware! It will bite your face off.
Girl 1: “Oh, look! It’s a wild Bifney!”
Girl 2: “I’ve heard wild Bifney’s can be dangerous.”
Bifney by totallynotstella November 28, 2021

loony binner 

Someone who belongs in a loony bin but with the added subtle implication that even when a person appears fully functional and sane in the world that the truth can be entirely otherwise.
As I sat at my computer workstation on the other side of the wall from where the shrieking mentally ill prison inmate was coming entirely unglued, performing all of my workplace tasks without difficulty, a novel question popped suddenly into my head: just who exactly is the loony binner?
loony binner by Dr Bunnygirl September 3, 2019
When one pops a boner (erection) while doing business.
I was looking at cheryl from my cubical and I sprung a bizner.
Bizner by Tzatziki Sauce November 10, 2010