When you have 1 substance (dunkaroos) which should be used with another substance 2 (frosting), and you end up with way more leftover substance 1 or 2 and you have no idea what to do with the substance in question.
Shant: Damn homie, I have all this frosting but no Dunkaroos left, what the hell am I supposed to do with this?

Brian: OMG dude, I dont know. Thats crazy. The Dunkaroo Effect is difficult to overcome..
by TheRealYancy April 14, 2010
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We just won against a bunch of dunkaroos.

I wanna play a dunkaroo in one on one.

Shoot ya dunkaroo!
by Shane Sanders June 20, 2007
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When a male is giving anal sex then does the old ass to mouth trick and puts his dick in the girls mouth.
Eric gave jen the old dunkaroo!
by Bri guy24 September 13, 2007
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Being a legal adult (over the age of majority, 18) and preparing one’s own icing of preference (i.e. buttercream, chocolate, etc.) and proceeding to dip cookies (i.e. animal crackers, graham crackers, etc.) in said icing to consume.
“I have a sweet tooth and am feeling nostalgic. Feeling something with this leftover icing and cookies, maybe.”
“Make some adult dunkaroos (ADRs)!!”
by Mrs. Grizzle February 5, 2022
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When you shit into a pocket pussy and masturbate with it
Josh Peters lubricated his PP with a good old Dallas Dunkaroo
by Shea Gibson July 31, 2021
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When you lubricate one's anus and quickly insert or "dunk" your testicles into his/her rectum.
Ex.
"Oh, I'm gonna be Dunkarooing you so much tonight."
by Biggycheezman December 11, 2019
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Number 1: This kangaroo has no genitalia.
Number 2: It must be a Dunkaroo then.
by OhNo S. August 28, 2022
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