Top Definition
Bonais (Bone - Ayes) is basically a word hybrid of Boner Mayonaise, which is Semen that is ejected or discharged from an erection. If however the semen is discharged from a non-erect penis which is however Physically, Mentally, and even Technically impossible, it would most likely not be considered bonais, but seriously, if you actually managed to do that, you should go see a doctor and get that shit checked out.
Billy "Jim what are you doing in my bathroom?"

Jim "ejecting bonais from my erection"
by Dehe August 09, 2009
An abundance of boners.
Sara was astonished at the sight of all the Bonai before her.
by Commander Mander Pander May 06, 2009
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