1. An incredibly annoying way of stating that you just don't want to tell them something; might be for personal reasons. (Knowing that you cannot get younger; it therefore means one will never tell them what you are referring to.)

Caitlynn: Why won't you look at my face when we make love!?

Me: *turns away and thinks to self "ah crap, here we go again... c'mon, think of something!* ...I'll tell you when you're younger...

I'll tell you when you're younger by The OPB: Original Purple Belt October 13, 2010

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I'll tell you when you're older

A phrase used when something can't be explained to a child

7-year-old: *catches adolescent brother watching porn* What is this?
Brother: I'll tell you when you're older.

I'll tell you when you're older by frabrizio March 23, 2017

I'll knock you're clock

A slang term used to threaten another human via a punch to the face.

Thomas: Hey RJ you're overweight!
RJ: I'll knock you're clock!

I'll knock you're clock by poutef May 16, 2017

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what you're doing with your mouth is illegal

you are being a dickrider or you are on somebody's dick

James: your shirt is mad ugly, you need to throw that shit away
Jerry: what you're doing with your mouth is illegal

what you're doing with your mouth is illegal by Canarsie57 December 16, 2021

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