Top definition
verb (used with object)
To ruin, mar, destroy, render useless, or otherwise annihilate.
Wow you really buttnecked your dad’s garage door by backing the truck into it.
by Chief Twobagle January 07, 2019
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2
a neck that looks like a butt because of the fat on the neck
"check-out that guys buttneck!!!!"
by matthew April 05, 2003
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