Mums soul 

Kind of like saying you promise? Or saying you swear on god

Say mums soul that you kissed that girl

Mums soul by Blazing bull dog December 31, 2021

Mums soul 

A phrase popularised in Melbourne, Australia meaning to swear on something, or make a promise.

Most often used when trying to convince one of the boys about some crazy story they probably wouldn’t believe.

Example:
“Bro we were up all night going hard and this guy jumps off the balcony and laughs, mums soul”

*Watches horror movie*

“Nah mums soul I would’ve ran straight away”

Mums soul by C.blackers July 27, 2023

Mums soul 

Putting your mothers life on the line to prove something

"yo I swear i kissed that girl the other day"
"mums soul?"
"mums soul!"

"aight bet"

Mums soul by @asian.alexa May 25, 2022