99% sure

A phrase used when you think something is right but you really don't know jack shit.

Guy 1: Is my wife home from here business trip yet? I'm planning on bringin' some chicks over for a party. Guy 2: I'm 99% sure she isn't. Wife: I've been here all fucking day you asshole.

by Jay Danger April 25, 2008

99% sure

When you're sure but don't know for a fact

I'm 99% sure that's not what he meant

by frabrizio December 17, 2017