sneaky nuts 

(noun) The practice of secretly showing one or both testicles while standing in the background of a photo. Can be either the through-zipper or above-trousers type.

Made famous by Nathan in the Chris Lilley comedy Angry Boys.

Nath's got this new thing he does, it's called sneaky nuts. Fucking classic. Stands in the back of a photo, rips out one ball, sometimes two. Sometimes through the zipper, other times above the trousers. He tends to mix it up a bit so you never know what you're gonna get. Fucking brilliant Nathan is.

sneaky nuts by doc brown April 21, 2011

Sneaky nuts release 

When an artist or band unexpectedly release some new music. Derived from TV comedy Angry Boys, sneaky nuts is a game where you sneakily reveal your nuts or balls whilst posing for a photo.

Hey broseph, did you check out Radiohead's sneaky nuts release last week?!

Sneaky nuts release by TheGrizard October 8, 2018

Cute Sneaky Nuts 

The worst group chat in the world. Full of annoying parxies.

I blocked Cute Sneaky Nuts months ago!

Cute Sneaky Nuts by frootdick November 9, 2019

Sneak nuts 

When you're taking a photo and you slightly pull your sack out so that its inconspicuous in the moment but forever enshrined in the picture.

Hey remember that picture we took on Christmas 2 years ago, there was some sneak nuts in it.

Sneak nuts by Masterdefiner69 July 28, 2019