by Strawberry96 April 10, 2022

To describe someone who's older or getting old yet still badass or strong in their age. Derived from the prehistoric fish "Dunkleosteus" and the slang for an older person "Unc"
Tom: "Dude why'd your dad reference Metal Gear? How old is he?"
John: "Old enough to have fought in Mogadishu"
Tom: " Total Unc-Leosteus"
John: "Old enough to have fought in Mogadishu"
Tom: " Total Unc-Leosteus"
by ELRaptor08 October 14, 2025

by Unc Bae August 9, 2023

by A1.9iner November 24, 2021

A recent slang term on social media with the purpose of poking on someone's old age. This word can be brought up in a conversation if an older individual tries to express or brag about their old experiences and past, usually insulting younger individuals who didn't experience the same things the older person did.
person 1: I've been playing this game for like 15 years, ya'll niggas don't know nun about me
person 2: chill Unc
person 2: chill Unc
by CouldntThinkOfNameIdeas March 8, 2024

by ChancellorUncle March 19, 2024
