Bugs 'n Scrap Iron
Slang for Briggs and Stratton, probably referring to how cheap and common they are.
"Hey man! That's a nice lawn mower!"
"Yeah! It's got a 20 inch deck, and is powered by a five-horse bugs 'n scrap iron!"
"Yeah! It's got a 20 inch deck, and is powered by a five-horse bugs 'n scrap iron!"