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Australian slang meaning "most excellent, cool, great etc". Also spelt BONZA.
Bonzer is also the name of a catering can opener, usually counter mounted.
The Bonzer Mat is a new kind of race track system for very small radio controlled cars.
open this can with the bonzer mate
been a bonzer day at the beach
Had a really close race on the bonzer mat today.
Bonzer by jackass666 April 13, 2006
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ow Bonzer ive won 1oo quid!!!!!
Bonzer by gregg April 16, 2005
"Wow. That's Bonzer!"
Bonzer by Bonny lad November 11, 2004
GUY: "WOW that was great sex"
GIRL: "no that was BONZER sex"

Shit Boner 

When you get a boner after taking a shit.
Dude I just took a massive shit and now I have a shit boner.
Shit Boner by HotDogPaws November 26, 2022

Business Boner 

Colloquial term referring to the arousal generated by a successful business idea, success, or venture.
Dude we just won a $1M deal, I’ve got such a business boner right now!!!!!
Business Boner by SS-Chi-town November 25, 2017

Shit Boner 

The erection you receive while excreting feces from your anus.

Also can be Shitboner or Shitbonér if you're French.
I was taking a shit this morning and then out of nowhere--BAM!--I got a shit boner.
Shit Boner by bagelsFOAD April 6, 2010