Gank

Gank is a recurring phrase commonly used by Dean and Sam Winchester. It refers to them killing a monster.

Overview
In Caged Heat, Dean used it when he asked Sam about them previously killing demons but now work for them.

During Frontierland, Dean used it when he told the Deputy about Elias Finch while the latter was confused by the phrase.

In What's Up, Tiger Mommy?, Dean used it when telling Castiel that they would defeat the Leviathans again.

In Season Seven, Time for a Wedding!, Becky used it after Guy reveals himself to be a Crossroad Demon and said if Sam knew what Guy was he'd "Gank your ass", something he agreed with.

Trivia

 * It is a recurring phrase in the show.