Ha! A long-term mystery has been solved for me. When I was a kid I encountered a tool called a "sloyd knife", which seemed like a really weird name. Now I know -- it's not weird, just Swedish. :-)
Years ago one of the brothers on Car Talk said that at his school when he was a kid, the remedial students who mostly shop work were called “Sloyds” and he never knew why. Now after years, and after his death sadly, I have the answer.
We actually just call them "smörkniv", with the litteral meaning of "butter knife". :)
A sloyd knife is not the same as a butter knife. You use a sloyd knife while making a butter knife. Sloyd knife in Swedish is "slöjdkniv".