? 

The ultimate response to anything in text.

Person 1: Hello!
Person 2: ?
Person 1: Hi, I'm new here.
Person 2: ?
Person 1: What?
Person 2: ?
Person 1: Okay?
Person 2: ?
Person 1: ..........
Person 2: ?
Person 1: I don't understand.....
Person 2: ?

And so on....

? by Footfungs May 6, 2010

? 

?

?

? by Frosty Dice 2 electric boogalo August 15, 2021

? 

you have got to be kidding me.

how STUPID do you have to need a definition for a question mark?

? by un-dumbassify yourself, please January 3, 2010

? 

something you should not ignore when reading something shit

"so he came to the the s random site and asked something: "am i in the urban dictionary ?"

? by dont take me seriously . August 21, 2020

? 

A question mark. Usually placed at the end of interrogatory sentences. Occasionally placed above comical video game characters, such as soldiers in the Metal Gear video game franchise.

Gabe: "What's this... ?"
Perry: "It's a quenstion mark you idiot, now go back to grade school you shameless idiot."

? by Jin Masashi May 28, 2005

? 

A common use of Internet or AIM slang usually short for a given question(ex1), or a way to say "Please elaborate", a short version of "...?" (ex2).

Frank: Guess what?
Joe: ?
The '?' is used in the place of the work 'What' which would be the obvious responce.

Frank: So I finally talked to Jessica.
Joe: ?
Instead of saying "and?" Joe uses the "?" command.

? by Woyna July 19, 2005

? 

When sent in a text message, with no accompanying message, meaning that you are as ripe as pie for a booty call.

Amelia texted "?" to Shane. His response was instantaneous, "tell me when and where, i'll be there."

? by Etak_soda December 6, 2011