to have intercourse or court someone
I'm going home to my woman and beat the buns.
When you go out dancing and grind dance with someone from behind. The beating can be performed with your genitals and/or hands. A gentleman will always warm his hands up be rubbing them together before performing the spank.
Can also be abbreviated to "B-in B's"
Q: "What'd you do last night"
A: "We went to the club and were beating buns"
or
Q: "What were you doing out there?"
A: "Just B-ing B's"
or
Female: Damn I just want to go out tonight and get my buns beat.
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