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When you come around the bowling ball instead of keeping your hand under it. Commonly leaves the 10 pin standing.
He moberged that ball so hard that it curved into the gutter before hitting any pins!

Stop moberging the ball! You need to keep your hand under it!
by Cheeeeeeeech January 22, 2013
When someone cancels an appointment, no-shows or burns you in some way.
My date moberged me last night, when she said she was washing her hair and couldn’t make it.
by JJK03 June 27, 2006