A description used when someone or something has an over-the-top randomness that seemingly defies common sense, the laws of physics, or both.
Whenever you're playing with the Hyper Destructive Bouncing Ball, things are bound to get super silly.
by Fear Breaker October 8, 2014
Get the super sillymug. This word is used by Lizzy and can only be used by lizzy.If copied by anyone u will get 91799199 years of bad luck so dont copy her phrase.
by Lizzyscupcake018 January 9, 2022
Get the Silly Billymug. by Xxsheliexx December 6, 2024
Get the Feltch me sillymug. a word twisted by tiktok meaning “cute” or “crazy”
commonly used to describe animals (more specifically cats) or loved cartoon characters
commonly used to describe animals (more specifically cats) or loved cartoon characters
“look at that silly car :3”
by mindymations December 25, 2023
Get the sillymug. 
The polite way of telling someone they're a dumb ass without letting them know you're thinking they have recently acted or spoke without using even an nth of thought/brain activity.
Act: Your best friend insistently waving at your mom as you drive past her in the Walmart parking lot while skipping school.
BFF: Look! It's your mom. (Waving and yelling, "Hey Mrs. Connor")
You: Yeah but we are supposed to be in gym class right now, Silly!
BFF: Look! It's your mom. (Waving and yelling, "Hey Mrs. Connor")
You: Yeah but we are supposed to be in gym class right now, Silly!
by MiiTrash June 6, 2021
Get the Sillymug. Another way of saying "pissing on your own chips", "making things harder for yourself", or "shooting yourself in the foot". If you've shagged yourself silly, you've really messed things up for yourself and created a total disaster which could have been avoided had you stopped to think. This phrase takes a nod to the act of inbreeding.
Dear Tory Twat, you're absolutely shagging yourself silly by planning to build over 7000 houses on a floodplain.
by Ilson Jackie September 6, 2025
Get the shagging yourself sillymug.