The product of having extreme hardcore anal sex with someone who has to take a shit. The feces are left mushy and loose often seeping from the anus in a soft milkshake-like form.
Miranda: Are you ok? You're walking a little funny.
Jennifer: Yeah. Billy Bob gave me an ass milkshake last night.
Miranda: OH SHIT!!
Jennifer: Yeah. Billy Bob gave me an ass milkshake last night.
Miranda: OH SHIT!!
by Dr. Purple Cock February 5, 2014

by Shadoweyes 27 August 10, 2018

Tony came back from the surf club with some felchers milkshake on his lips. I knew he was a suss cunt
by Irootedyamum July 4, 2019

The word you say when you want to engage in sexual acts with your friends with benefits or a word that can replace the word "sex".
"Hey babes wanna Funtime Milkshake?"
" I heard Phil and Stacey had a Funtime Milkshake the other day"
" I heard Phil and Stacey had a Funtime Milkshake the other day"
by jesusurlocalhormonemonster March 19, 2019

by Bigbewwie69 December 28, 2020

When a politician ingests something poisonous to inspire consumer confidence or silence political controversies associated with tainted food, drinking water, etc..
Ex1:
"Did you see Obama drink that devil's milkshake when he flew into Michigan, earlier?"
"I did! I guess there's nothing wrong with all those children drinking Flint tapwater after all."
"Did you see Obama drink that devil's milkshake when he flew into Michigan, earlier?"
"I did! I guess there's nothing wrong with all those children drinking Flint tapwater after all."
by PeggyDwyer November 16, 2020
