Pronunciation: /ˌɛs.aɪ.ˈɒn/
Used to emphasise that a statement is serious and not made in jest; a stronger form of promise or assurance, typically employed when ordinary affirmations such as “I swear” or “I promise” might be doubted.
Blend of “Seriously on”, developed as a convention for distinguishing genuine statements from jokes.
Used to emphasise that a statement is serious and not made in jest; a stronger form of promise or assurance, typically employed when ordinary affirmations such as “I swear” or “I promise” might be doubted.
Blend of “Seriously on”, developed as a convention for distinguishing genuine statements from jokes.
by Viper2025 August 27, 2025
Get the S I Onmug. by oh135 June 4, 2022
Get the Throwing up 4’smug. Like the best living thing in the world. bro if you got a friend named morgan s and she types in all lower case letters she yo main don’t let her go
by purple sky popcorn March 12, 2020
Get the morgan smug. Stands for “suck an egg”.
by LukeWarm9696 December 9, 2021
Get the S-A-Emug. 
An animal who has committed various war crimes on makeup and was recently diagnosed with bipolar and doesn't like positive feedback from her audience
by Solo Africa November 13, 2023
Get the lia"s hidden pagemug. by robynmr May 25, 2022
Get the holding up 4’smug.