When there's a guy in the background of a porn flick that is beating off in the shadows and his only reason for being there is to enter the main scene & drop his "product" on the girls jaw line. When that's done he vanishes. Sometimes you may ask yourself, "Where did he come from!? And why!? That was a peek-a-boo popshot if I've ever seen one!"
by Furtherconspiracies February 5, 2010

When you take a huge shit, flush, and just when you think the turd has been evacuated, it pokes it's head back into the toilet bowl.
Thomas: Oh you *****
Brett: What?
Thomas:
I just had to plunge your peek-a-boo poo
Brett: Haha I didn't know it came back up!
Brett: What?
Thomas:
I just had to plunge your peek-a-boo poo
Brett: Haha I didn't know it came back up!
by J. Masse April 26, 2009

I was makin sex with my girlfriend when I pulled out and cummed on her stuffed paddington bear. Hence, Peek a boo paddington!
by LeRenardS13 March 8, 2008

n: when one's penis reverts into the pubic region via shrinkage, thus creating a peek-a-boo effect, whereas the penis becomes concealed one moment and visible the next; usually occurs in the event of a cold submersion, the presence of fat bitches, FUPA(S), and/or nauseating wenches.
by TWCstuntin July 27, 2010

by DuRagHater March 26, 2009

Classic scam mastered by Frank Gallagher from Shameless. Involves jumping out in front of a moving car as your partner distracts them, then shaking them down for cash. Also the slang term for the surprise Trump got when several respected diplomats jumped out and testified against him regarding his extortion campaign in Ukraine.
Definition 1:
Frank: Bro, I'm short on cash. Let's do a Ukrainian peek-a-boo!
Frank's creepy friend: Nah, man, people don't carry cash anymore; it's not worth it.
Definition 2:
Rob: Dude, did you see what happened with Trump!?
Tom: Yeah man, he got a serious Ukrainian peek-a-boo!
Frank: Bro, I'm short on cash. Let's do a Ukrainian peek-a-boo!
Frank's creepy friend: Nah, man, people don't carry cash anymore; it's not worth it.
Definition 2:
Rob: Dude, did you see what happened with Trump!?
Tom: Yeah man, he got a serious Ukrainian peek-a-boo!
by Notdevinnunes November 24, 2019

A Peek-a-boo Facepalm is when it becomes so bad you have to peek to make sure it was really that bad.
I was with a friend and he did a trick on his bike and faceplanted...I had to do a Peek-a-boo Facepalm.
by Navaih June 5, 2010
