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. 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. Unwarranted criticism from your Uber driver about where you waited to be picked up, your luggage size, your desire for air conditioning or how loudly you slammed the door.
When a got in the car the driver gave me a bunch of Uber sass because he had to cross the street to pick me up.
by Ruthozark September 28, 2017
Get the Uber Sassmug. 
by anonymous December 11, 2020
Get the sass masta from doncastamug. by JKJR June 20, 2021
Get the Sassmug.