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A term usually used by young African-Americans(mostly males), used in order to figure out if the person they are speaking with wants to "step" to them.
"You tryna mack on my girl dawg? So what's up?!"
what's up by candice D May 14, 2005
A question asked by many, because somehow no-one knows what's up.
Random friend: "What's up?"
You: "I dunno"
Random friend: "You fool, you fell right into my trap, the sky is up there ya lil bish"
What's up by getrekthoney October 24, 2019
dude ok bro what's up mean what is up liek come on how did you not know that already unless you live under a rock.
what's up can define to hello and a radical and cool way.
"What's up" is an informal greeting that is often used as a way to say "hello" or "how are you." It is a casual and informal way to initiate conversation, and it is often used among friends and peers. The phrase is versatile, and it can be used in different situations, such as when you meet someone new, when you haven't seen someone in a while or when you're trying to start a conversation with someone. It is a colloquial expression and it's commonly used in spoken language, but it can also be found in text messages, social media, and online chats. It is a way to signal that you are friendly and approachable, and it is often used in a more relaxed or casual setting. Some people might respond to "What's up" with a simple "not much" or "just hanging out" as a way to indicate that they are relaxed and open to conversation. Other people might use the phrase to ask about someone else's well-being or to express their own. It's a simple but effective phrase that helps people to connect and make small talk.
Joe: "Hey Bob, what's up?"

Bob: "Not much, just hanging out. What's new with you?"

Joe: "Not much, just finished up a project at work. How's the new job going?"

Bob: "It's going great, thanks for asking. I'm loving it so far."

Joe: "That's great to hear. Want to grab a beer later and catch up?"

Bob: "Sure, that sounds good. What time works for you?"

Joe: "How about 7 o'clock at the usual spot?"

Bob: "Sounds good, see you then."
What's up by dwdwefewf January 21, 2023

What's Up?

1. A casual greeting or conversation starter, somewhat of a rhetorical question.
Usually followed by something like "Not much, you?," "Nothing much," or even answered with a "Hey man, how's it going?"
syn: How's it going? What is new?

2. syn. What can i do for you?, What would you like? What's on your mind?
1. Person #1: Hey There! What's up?
Person #2: Oh not much. What's up with you?

2. Person #1: Hey come here for a second, I have to ask you something.
Person #2: Ok, what's up?
What's Up? by GangstaRL December 28, 2005

What's up?

There are many definitions for this.

1. The opposite of down.
2. The sky
3. The clouds
4. The sun

5. Space

If you want to be boring, you can just say:

1. Good
2. Bad
3. Okay
Me: Hi

Mom: What's up?

Me: The opposite of down.
What's up? by OofBanana March 19, 2019