When two people are having sex, someone runs in completely naked except for a mask (preferably some sort of animal mask) slaps whoever is on top on the ass, screaming and jumping and laughing the whole time, then runs out of the room and closes the door.
Dude, Bry was with his girl last night and I gave him an ANIMAL SURPRISE...I knew that gorilla mask would come in handy. He showed me the red mark on his ass...NICE!
by Grindhouse February 19, 2011

The sexual act of filling your asshole up with whipped cream then proceeding to fart said cream into your partner's mouth.
by Dirk Dasterdly August 13, 2021

When you are too drunk to find the bathroom at your friend's house so you pee in your suitcase and when you wake up you get a suitcase surprise.
by aboutmosquito97 December 30, 2018

Cuck 1 "Yo Braden gave his friends a sandy surprise after they tried robbing him."
Cuck 2 "I remember when braden gave me his first sandy surprise
Cuck 2 "I remember when braden gave me his first sandy surprise
by Pimppaddydaddy June 20, 2024

When a food server becomes angry with the customer and adds their secret ingredient into the item being served. This is the next step above spitting in one's food.
Tino: "I was a jerk to that vendor. I hope he doesn't do anything to my ice cream."
Brendan: "He was very angry. You probably got his pube surprise."
Brendan: "He was very angry. You probably got his pube surprise."
by afaraci12099 August 17, 2016

The uncommon sexual act where the male claims he is about to ejaculate upon ones' face, but instead slams them in the face with their sturdy, hard schlong with enough force to leave a bruise.
"At a unanimous vote of 11-4, I hereby find you guilty of 1st degree murder of a young girl caused by blunt force trauma, as a result of this, so called, 'Sledge Hammer surprise'."
by GoodOldNO_NAME August 26, 2017

Surprise has 2 meaning; an unexpected event or gift; a polite way to say that a person was a mistake
by _Deadly_PvP December 27, 2020
