sneaky big 

To actually be larger than first thought or to have the ability to hide it well.

Employee #1 Damn, did you see that new HR girl?
Employee #2 Sure did! Saw her bent over the candy bowl, dominating it. She's sneaky big!!!
Employee #1 No way! She looks hot!
Employee #2 Look, there she is now, at the candy bowl again. Check out that backside.
Employee #1 Damn!!! Never noticed it before, she is sneaky big!!!
Employee #2 Id still hit it though!
Employee #1 Not if I was on it first!!!

sneaky big by frainslug February 14, 2006

Sneaky big tits 

Girls who don't appear to have large breasts in their daily wardrobe but then when seen dressed to go out do, in fact, have bodacious ta tas.

Usually she wears hoodies but if you'd seen her at the club you'd know she's a sneaky big tits.

Sneaky big tits by Jonny Jonzes March 18, 2017

Big Sneak 

It is an adjective to describe someone of being very sneaky in Fortnite Battle Royale

Corbin and I were big sneaks

Big Sneak by YeetersonPeterson March 19, 2020

BIG SNEAK 

A person that pretends to be loyal and loving to get what they want at the moment. After they do they turn cold and calculated. They use your insecurities to hurt you. Then pretend that their actions had nothing to do with you. They seem so kind but they're really sneaky slime.

Her: Let's go hiking babe
Him: I'm so busy this week babe
His Facebook story: Him and a different woman hiking
Her: Wow who is she? I thought you were busy. You just didn't want to take me you BIG SNEAK

BIG SNEAK by Nay'Edeni August 1, 2020