Expletive used by northern girls usually from in or around the Grimsby area in Northen England. Said when something goes wrong or to express suprise over an unprecedented or shocking event
"Oh My Gum, he has eaten my tum" perhaps said if a snake such as a Boa Constrictor has eaten your stomach.

"Oh My Gum" if a person is shocked or surprised about something
by MC ALAN HYPER D May 20, 2008
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