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 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"
by Finchy19 October 13, 2009
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..."
Person 2: "I know what you mean. I'd rather get a Rusty Breadknife..."
by CaptainNutSack August 17, 2013