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.
By Mozelle
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
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
Girl walks by with a big ass.One Nigga turns to another and says "Sign me up for that Booty Duty"! Usually followed by a shimmy to show how impressive that ass was.
By Tyne
I Didn't Sign Up For This!
When something is not what you agreed to or anticipated to be.
Why is my rent2x higher now? I didn't sign up for this!
