what's up?

idiom

US, informal
used as a friendly greeting
Hi, Jim. What's up?

Dictionary Entries Near what's up?

Cite this Entry

“What's up?.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/what%27s%20up%3F. Accessed 22 Dec. 2024.

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!