1.) Similar to the Christian Antichrist, only this is a female who makes it impossible for you to get aroused.
2.) A very sexually un appealing, awkward female who lacks intercourse skills.
Synonyms -"Sexually awkward, Unappealing, Sexually boring"
Antonyms- " Amazing, Sexually talented, Fun"
"DAMN GIRL THE SECOND COMING NEVER CAME!! Probably cause you're the Antiboner."
"We spent hours on floor play, and she still couldn't get me up. She had to have been the Antiboner."
"You're a real Antiboner"
2. Any event so shocking it causes a boner to instantly die
3. Used to describe the ugliest of women
"Ahhhh, that shit is the anti-boner"
"I heard horse faced Gina started to grow a mustache."
"That girls smile is the anti-boner."
"The other day I was making out with my girlfriend, and her grandma walked in with her top off... instant anti-boner for life."