oopnus 

be full of wicked craftiness, in otherwords, to be fully cool.

ie;" You only wish to be full of the oopnus, such as I, get down with the OOPNUS!!!"

oopnus by Smalley and Bob Craftygoddess April 28, 2006

Magnum Oopus 

A person's biggest screwup.

Knocking down all the shelving in the parts department was my Magnum Oopus. What a mess.

Magnum Oopus by Hmd107 December 21, 2020

Oopus 

Like bill and teds bogus adventure, the average day in the life of Ryan and Sam

"dude did you hear about their Oopus day yesterday? Steve ended up in Stephanie's panties and they beat a goat at monopoly"

Oopus by Ding Chaveze August 17, 2011

Oopus 

It’s like oops
but instead it’s oopus
Also oopusite
The oopusite of yes is no

Oopus I didn’t know if an iguana was a fish or a meat

Oopus by Tarquin talks in third person December 27, 2020

Oopus 

A way of saying "oops" but in a weirder fashion.
This is usually used in text, but can be used in person if one already knows the meaning of "oopus."

Person 1: "Hey what'cha wanna do tomorrow night."
Person 2: "You😏"
Person 2: "Oopus!"
Person 1: "uh.... nevermind, man."

Oopus by Ace Ventura: When Nature Calls January 26, 2022

Magnum Oopsus 

A screw up so big, that it'll be the only thing your legacy will be remembered for.

Elon Musk's destruction of twitter was his Magnum Oopsus

Magnum Oopsus by MrLint April 7, 2023