In reference to an “I do all my own stunts” shirt:

That’s a bashful circlehead.

The same term is applied to the figures in pedestrian crossing signals.

Goo-goo is male. Gaa-gaa is female.

Cacootin: definition unknown.

Dad: Max, what do you know about correlation?

Max: It  does not imply causality. 

Of course, his tediously intellectual father taught him that, and as a result, there is now a 4 year old who knows more than you about economics, science and politics.

Bomminitin: A naked baby butt.

Wackin baby: The person who is “it” in a long-term game of tag. 

Usage: 

Who is the wackin baby? Mommy is the wackin baby.

 

Occan-dingdong: In a children’s book, character who is drawn facing the reader. 

Usage: 

That’s an Occan-dingdong. The rain babies are like an occan-dingdong. A strommel baby. 

Mom: Max, please don’t yell in the house.

Max: Max is using his forte voice!

Max greets his mother in the morning: 

Gargole, Gorgon and Soy sauce.

I’m looking at my belly button. Omphaloskepsis!

Dad is one of those obnoxious NPR-listening, wood-toy-buying, balsamic-vinegar-sprinkling, tweed-jacket-wearing parents that teaches his kid absurd words.