1) noun, singular. the bad end of a deal; the "shaft". 2) verb. to leave a party or gathering without bidding companions or the host farewell 3) an unpopular drink, dance move, and sexual maneuver all created by the same unfortunate individual.
1) Ted bought some weed from his friend Justin, but when he counted his change, he realized that Justin had given him the johnny hop; 2) Megan took one look at the other guests at the New Years party and decided she would johnny hop as soon as she got the chance.