When the bill of your hat is curved up. Caused by the bill bumping against a belt buckle from sucking dick
"Hey Derrick, that's a nice bucklebumper you got there. Your homies must be proud"
by BLD127 April 24, 2021
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Two homosexual cowboys engaging in intercourse
Gay cowboys engaging in intercourses
Chris and John are a couple a bucklebumpers”
by Meatychungus April 10, 2020
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