An infant butt.
“They’ve got a small ass!” “That’s rude.” “Ah, sorry. They’ve got a Buttlet.”
reverse shet, aka it goes back up your arse
"i just took an oocken acken, imma ecken ocken it back up"
baby egglet
"oh! What is that?" "That, my friend, is an eggletling."
to take a shet
imma up and oocken acken