Kid Flirt 

When a little kid is flirting with someone much older than them of the opposite sex by trying to get their attention. Sometimes acting up and going out of their way for the attention.

A 9 year old boy acting up in front of a 17 year old girl for attention.

9 year old: You don't know my name!
17 year old: ...
9 year old: Bet you can't guess it!
17 year old: ... I wish this boy would stop kid flirting with me.

Kid Flirt by Annon~ October 15, 2010

flintstone kid 

a young trainhopper. This is a sometimes affectionate, sometimes derogatory term that old train riders gave young train riders. the term FLINTSTONE KID is derived from the tendency of young riders to have bones in their noses, orange hair, and skateboards; i.e. known punk regalia.

We are Flintstone Kids: one million strong, and growing.

flintstone kid by dorkhammer November 15, 2007