sign up 

1. Putting yourself or someone else on a list for an activity, class, etc.
2. When someone is instant messaging you and they suddenly sign off because of something you say (similar to "hang up" on the phone)

guy1: i heard this year mr. herbert is teaching woodshop.
guy2: i have to go sign up for that class!

girl1: what happened last night? you totally signed up on me!
guy3: sorry, my internet connection is horrible.

sign up by gimmieyertots March 22, 2005

sign up 

When there is an activity you are forced to do or did not want to do, you would say, "that is a sign up" because you didn't sign for the activity you are being forced to do

My mom told me to clean the poop out of the toilet, thats a sign up.

sign up by Jett Hiu February 8, 2017

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NO DONT DO IT

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Sign up Enter your email to get Urban Word of the Day free every morning. Your email address... Subscribe by Tee_Kay_ March 6, 2022

Sign up and start having fun! 

Who new to playing roblox

New Player: is there some games are safe for me
Roblox: Sign up and start having fun!

Sign up and start having fun! by Bak Hyemi July 1, 2021

Sign up Enter your email to get Urban Word of the Day free every morning. 

When your chronic boredom has control over you and decide to copy 'Sign up Enter your email to get Urban Word of the Day free every morning.' right from homepage. Don't lie, you tried qwertyuiopasdfghjklzxcvbnm then mnbvcxzlkjhgfdsapoiuytrewq, etc.

I am sooooooooo bored that I gonna search up 'Sign up Enter your email to get Urban Word of the Day free every morning.'

Holy shit, whoever defined this is more bored than I am

Sign up Enter your email to get Urban Word of the Day free every morning. by Notmelol123 February 15, 2022

No sign up no bullshit 

This is a term used by pornhub it is basically for any of the ads on the top of the videos saying that you don’t have to sign up to go on this other website and ... it’s not bullshit

“Horny moms in your area no sign up no bullshit”
“Wow I’m convinced... wait mom! Why are you the first one on this site!!”

No sign up no bullshit by That1guy64 July 31, 2019

I didn't sign up for this!

When something is not what you agreed to or anticipated to be.

Why is my rent 2x higher now? I didn't sign up for this!

I didn't sign up for this! by bruhthisismyhandle September 12, 2021