1 definition by miss chav

Gbtm means god bless the mark. Often used by travelers/gypsies and teenage girls who are wannabe gypsies.
*Gypsy sees a girl that she doesn’t like*

Gypsy: Aw gbtm I’ve never seen a more foul looking lackeen in my life the state of her😂
by miss chav December 7, 2019
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