Rusty Breadknife 

A term used to express a very large disliking of a product or service, where one would rather cut their male appendage off with a Rusty Breadknife then use said product or service again.

Person 1: "Ah man, I just downloaded that awful Candy Crush game everyone seems to be play, I don't get it? It's shit!"

Person 2: "I know what you mean. I'd rather get a Rusty Breadknife..."

Rusty Breadknife by CaptainNutSack August 20, 2013

Breadknife 

Taken as a spin off from the term "to cut someone's lunch" which in turn means for one person to 'hit on' or 'flirt' with another person's partner/girlfriend/spouse.

A breadknife is used to cut a sandwich, which may be someone's lunch.

A friend decides to flirt with your grilfriend when you are not present, he could be described as cutting your lunch, and thus you are entitled to call him a "Breadknife"

Breadknife by Finchy19 October 13, 2009

Bread Knifer

You do the biggest solid pooh in the known universe. usually dry with no use of paper, (or your partners face cloth), it is the need to cut it up with some tool, like a bread knife( partners toothbrush) to cut it in pieces in order to flush it

Should have seen the Bread knifer i had to let go.

pooh shit dump crap poop

Bread Knifer by ConFest Pete September 11, 2011