1. misspelling of "bar of soap"
2. frozen soup in the shape of a bar
son: *texting* mom can you get me a bar of soup when ur at teh store?
mom: bar of soup? what's that?
son: *bar of soap lmao
person 1: i have a bar of soup in my freezer!
person 2: what's that lel
person 1: frozen soup.