Whatanighter 

The act of frequenting the local Whataburger while pulling an all-nighter.

"Yesterday I pulled a whatanighter while being served coffee throughout the early hours of the morning."

Whatanighter by Rogi__ April 8, 2009

Whatanight 

the evening that everything went right, the party was amazing, and everything just gets better and better.

Dude 1: Hey, how was your night, last night?

Dude 2: Man, that party awesome, nothing went wrong.

Dude 1: Man, whatanight. I wish I was there.

Whatanight by Diggy55 December 8, 2010