gutter mole
N; Someone who is continuously speaking perverted, normally using comments made by someone else to spark their dirtyness. (derived from the phrase "mind in the gutter")
Person 1: I'd really like a hot dog right now.
Person 2: I gotta hot dog for ya.
Person 1: Ugh, you're such a gutter mole.
Person 2: I gotta hot dog for ya.
Person 1: Ugh, you're such a gutter mole.