The act of receiving a less than stellar blowjob from some rando life coach behind a dumpster on top of a mattress after bar close.
Life Coach: Hi dude I never met before 10 minutes ago! Want to cuddle on this perfectly good mattress that was thrown away?
Dude: Ummm, ok.
(Both lie down together)
Life Coach: Want to make out?
Dude: Sure why not?
(Proceed to make out)
Dude: Hey you're not bad with your tongue.
Life Coach: You have no idea! Would you like a dumpster mattress blowjob!?
Dude: Yolo
Dude: Ummm, ok.
(Both lie down together)
Life Coach: Want to make out?
Dude: Sure why not?
(Proceed to make out)
Dude: Hey you're not bad with your tongue.
Life Coach: You have no idea! Would you like a dumpster mattress blowjob!?
Dude: Yolo
by Cockopotomous January 10, 2018

that large wide thick juicy dense baguette thats been sitting out all day and might be a little hard to cut
by maezvi March 1, 2025

A discord mattress is when a female of a discord server engages in sexual intercourse with more than one member of the discord in real life.
by TheWhittyOne September 7, 2023

A bra with so much padding/push up that the extra volume alone is larger than the size of someone's boobs. Mattress bras are usually extremely thick and uncomfortable to wear.
"Dude, this chick I took home last night had MASSIVE TITS. I was so excited until she took off her mattress bra and she went from a DD to a B at best..."
by UrbanDictionaryDoctrine May 30, 2017

When you live above the 40th parallel and you don't have a garage to keep your car in during the winter, you may find yourself driving around with an 8 inch thick slab of snow on the hood of your vehicle.
I thought that it was starting to snow while driving down the highway, but it was only coming from the giant snow mattress on top of the car in front of me.
by Mysterio 015 January 3, 2023

by Daproduca May 20, 2022

by Teacher C March 24, 2019
