Telling someone what or how they should text.
John- Dude you should text her "Fuck You!"
Bob- Quit backseat texting.
The backseat is usually for little kids, immature teens and drunk adults. The backseat is for party's, arguments and socializing and sometimes sex. All around the backseat can be a great place especially on school buses.
Guy 1: let's get to the backseat
Guy 2: yeah I need to show something
Girl: want to see my boobs
Guy 1&2: BACKSEAT RULES!!
To love engaging in anal activities
On our first date she told me "backseat are my favourite"
Having intercourse in the back of a car where the female is bent over the back seat
I banged Abbie in the back seat yesterday, gave her a full backseat bender treatment.
handcuffs, shackles, or other slavery devices
man if your about to give me broken wrists in the backseat now would be when you duck.
While in the back of a car (any even a videogame) posting hentai/r34 to a discord server.
Joakim: Ok im backseating right now.
Geir: Wait, why now?
When someone shits in another person's ass.
"Normally I don't do Backseat Karls, but $20 is $20"