A place usually on a military base where you can buy and sell used cars, motorcycles RV's and other motor vehicles you can think of
I bought my new ford GT at the lemon lot the other day its pretty sweet expect they didn't tell its missing an engine.
A used car lot that sells busted ass vehicles, or the section of an automobile dealer lot where the used vehicles for sale are displayed
That dude who asked if my jalopy was for sale probably works for the douchebag who owns the lemon lot