Years ago, I had a cheap plastic handle Buck knife that I use to keep on my key ring. It was one of the little $4.99 knives that come in a plastic blister pack that hang on the display rods. The blade was maybe 2" long and I basically used it to clean my fingernails.
Anyway, at work around Christmas time, one of my co-workers walks in with a deep fried turkey and says "Let's EAT!!" It's around lunch time and we're all pretty hungry. So we all start looking at each other asking who has a knife...and nobody...had...a knife. So before we start ripping into this bird with our bare hands, I mentioned I had my keychain knife.
Long story short, I carved that entire turkey with a 2" blade that was so dull it wouldn't cut hot butter...and to this day, I can't remember if I cleaned it first. LOL!!