Knocking boots on top of a mailbox. The act is particularly disrespectful to the owner of said boots as well as a federal crime. It can be used as an act of revenge or as an erotic way of expressing one's affections.
Man, that girl is so hot I just wanna bang her on a mailbox!

or

In order to right the wrongs in his life, Greg was later seen banging on a mailbox.

or
That guy messed with me and the only way to get him back is to bang his girlfriend on a mailbox.
by Nick @ B3YOND! March 7, 2009
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