1 definition by HotpantsPoptarts

(v) When hooking up with a Sandwich artist from Subway or Quizno’s or any other sandwich making establishment, and the male put his mayonnaise (jizz) into the sandwich artist’s backpack (rectum).
Sara from Subway: Hey Tina, Jake, from State Farm, came over to get a sandwich during lunch.
Tina from Subway: Oh yeah, how was that?
S: Well, he was wearing these awesome khakis so I took him in the back room and we hooked up.
T: What?! Are you on the pill?!
S: No, so I had him put the mayonnaise in the backpack.
T: Oh I love mayonnaise!
by HotpantsPoptarts October 17, 2016
Get the Put the Mayonnaise in the Backpack mug.