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Brnstig : (pronounced as if it were spelled "brunshtig") backside, the buttocks, the bumcheeks, the chuddies, arse etc. Generally considered one of the more offensive definitions for the buttocks, given its extreme lack of vowels.

Origin : Eastern European street name, re-defined by touring musicians.
1. "Kiss my Brnstig"
2. "That girl's Brnstig is so large that it's pratically overflowing from her underpants"
3. "Get ready for me to thrunge your Brnstig with a lamp-post, in preparation for a good old Croach."
by ekul June 10, 2004
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