Runchkin 

A mischievous childlike combination of a runt and a munchkin.

That little Runchkin is running with scissors and loving it.

Runchkin by JimmyJames16 September 24, 2017

Doodle runchkin 

the smell of your anal sphincter after high erotic anal sex.

Dude that was some great anal sex but now my doodle runchkin is terrible.

Doodle runchkin by Queef licker October 28, 2009