what's with

phrase

informal

1

: what is the reason for (something)

(So) what's with the hat?

2

: what is wrong with (someone or something)

What's with him? Is he upset?

Examples of what's with in a Sentence

Recent Examples on the Web

Plus, how a State Department office aims to build relationships with young people around the world, and what's with these latest food recalls? — Taylor Wilson, USA TODAY, 4 Sep. 2023

As for Matthew, what's with constructing this entire crab-catching contraption? — Dalton Ross, EW.com, 16 Mar. 2023