1 definition by DWang2k

What's up? Day day up!

An question replaced "Hello" or "Hi" as the most popular form of casual greeting.
And the answer is from Chinglish, means "Study hard and make progress every day"

"What's up? Day day up!" example:

Person 1: What's up?
Person 2: Day day up!

by DWang2k August 11, 2014