to show up unexpectedly at the most inopportune of times.
As I was receiving the lap dance of my life by this bargain basement whore at my bachelor party, my fiancee popped up like a pimple on prom night and caused Willy The One-Eyed Wonder Worm to run for cover!
by weave November 1, 2003
mugGet the POP UP LIKE A PIMPLE ON PROM NIGHTmug.
n., Someone who comes in and out of your life. There one minute gone the next.
You can never count on this person to be there when you need them. They show up when it's convenient for them, usually with a hidden agenda.

I.E. On the 1st and 15th, I can expect a visit from my favorite jack-in-the-box-pop-up-artist
by TGDub September 1, 2009
mugGet the Jack-in-the-box-pop-up-artistmug.

Pop up

Start talking to someone on snapchat or instagram. Usually started by swiping up on their story.
by Gayshitwhosegay October 16, 2018
mugGet the Pop upmug.

Pop-up Willy

a toaster, something that you stick a piece of breat in to make toast or possibly grill cheese sandwich
Man stick your fork into pop up Willy n get my eggo
by the_toast_master April 4, 2005
mugGet the Pop-up Willymug.

wall-stalk pop-up

Someone who posts something random on your Facebook wall, or comments on a post for the sole purpose of being seen by someone else/making their presence known. Usually done by an ex-gf/bf, a wanna-be gf/bf or in sneaky cases, by someone who wants you to friend them but does not want to send a friend request for fear of being rejected, so posts it on mutual friend's page.
Usually this pop-up is ignored, like most screen pop-ups because it's an obvious "look at me" attempt.
Jenny: "Did you see that random post on Tom's wall from his ex?"

Alexis: "Yeah, I'm not worried. It's just a wall-stalk pop-up. He doesn't even talk to her anymore."
by jb3625 January 21, 2011
mugGet the wall-stalk pop-upmug.

Pop-up

A popular upload on YouTube or any social media.
"I binged all the pop-ups this YouTube channel last night. It was great."
by D wan-an ohnlee June 19, 2022
mugGet the Pop-upmug.

Pop-up

Short-term stores or temporary retail spaces that sell or promote food or merchandise.
I saw on Instagram that Kanye West has a pop-up in Brooklyn. They got free frosés and everything Kanye West. Let’s go!
by primalscreamer April 16, 2019
mugGet the Pop-upmug.

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