What is "wait for it"

phr. (context idiomatic colloquial English) (non-gloss definition: Used to draw attention to and build suspense, often ironically, for a remark to come).

"Wait for It" is the first episode in the third season of the television series How I Met Your Mother and 45th episode overall. It originally aired on September 24, 2007.

"Wait for It" is a song from Act 1 of the musical Hamilton, based on the life of Alexander Hamilton, which premiered on Broadway in 2015. Lin-Manuel Miranda wrote both the music and lyrics to the song. It speaks of Aaron Burrs undying determination in the face of Hamilton's swift rise to influence and power.