Gastropod

Gastropod: Snails and slugs.

These guys are members of a class of mollusks (Gastropoda) that use their stomachs as a foot.

I used to work with some guys like that.

A scientist named Georges Cuvier coined the word in 1795. Cuvier created the word by combining the Greek word for stomach, γαστήρ (gaster), and the Greek word for foot, ποδός (podos).