Big wow 

A sarcastic expression used to express just how unimpressed you are following a particularly boring or clichéd anecdote from a friend

Student #1: Last night I got so drunk I passed out in a toilet/lost my tousers/vomited in my own shoe
Student #2: Big wow

Big wow by bigmikey October 25, 2005

The big wow 

When something cool is happening its a "Big wow"

Patrick "George how the fuck are you so good at the game Counter Strike: Global Offensive?"
George "Because im The big wow"

The big wow by Esketit12 August 30, 2018