Refers to da sarcastic expressing of one's lack of respect for a particular fellow human by either braying like a donkey or mooning him.
An "ultimate" or "deluxe" form of ass-sassing someone would be if you are able to "train" your sphincter --- i.e., learn to precisely tighten or relax your butt-muscles during flatulence to make your farts "toot" at different pitches --- to hee-haw; that way, you can both drop your pants in da direction of whomever you are ridiculing AND give him a nice loud raspy-raucous "mule-whinney" at da same time.
by QuacksO April 1, 2020
Get the ass-sassingmug. When you criticism someone in a way that isn't serious, you're being sarcastic. Especially when you make it really obvious to the person that you're just having some fun and don't mean what you say. Online, often emphasised with silly smilies and such!
'Oh look at them, lurking in the chat room, hiding from the rest of us!' :)
This is silly sass.
This is sissy sassing someone.
This is silly sass.
This is sissy sassing someone.
by Pseydoname April 3, 2015
Get the silly sassmug. When a person is unbelievably sarcastic and real with you, to such an extent that it drives you back to therapy.
by user24575788 January 24, 2024
Get the ryan sassmug. 
You're not lipsinging you're Lip-Sassing
by KayMarie333 August 24, 2021
Get the Lip-Sassingmug. by cathygal1234 July 13, 2018
Get the Shore girl sassmug.