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1.
Blueberry surprise happens when a woman shoves a handful of blueberries up her vagina, then proceeds to have vaginal sex with an unknowing male participant. After the guy realize the vagina doesn't feel like a normal vagina, he pulls out, and once doing this the woman pushes all the mushed excess blueberries out and yells surprise!

This can also be known as a Blueberry Milkshake if the guy blows a load while the blue berries are still inside her.
I was pounding some girl and that bitch pulled that mother fucking blueberry surprise shit on me.
by ARan714 December 10, 2009
 
2.
1: When recieving fellatio and at the point of orgasmic climax, the giver forcefully grabs the recievers testicles and shoves them into the person's tight, sensitive asshole. The results in a very surprised look and, sadly, blue balls.
She gave me such a blueberry surprise I haven't touched my nuts in weeks or taken a dump in a month.
by Roy Sanchez August 08, 2006
 
3.
To sneak up on someone and simultaneously punch them in both eyes with your fists. Then, once they are helpless, cum all over their face.
Jared - "So I was hiding behind the bathroom door when my girlfriend walked in. I decided to sneak up on her and tap that bitch on the shoulder. When she turned around I gave her a blueberry surprise! Then told that bitch to make me a sandwich."

Hugo - "Nice dude."
by BrokenCYDEisCool July 25, 2009
 
4.
To sneak up on someone and simultaneously punch them in both eyes with your fists. Then, once they are helpless, cum all over their face.
Jared - "So I was hiding behind the bathroom door when my girlfriend walked in. I decided to sneak up on her and tap that bitch on the shoulder. When she turned around I gave her a blue berry surprise!" Then dumper her and never saw her again."

Hugo - "Nice Dude."
by JaredisAbeast July 24, 2009