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”
by C.blackers July 27, 2023
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