When your partner grasps your penis with one hand and vigorously strokes your banjo string on the underside of the penis up and down with two fingers until you bust a nut.

The banjo sting is medically known as the the frenulum.
Nothing makes me bust a nut faster than when Rachel strums the banjo.

I let the babysitter strum the banjo last night.
by Eaton Holgoode February 6, 2018
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ohhh dude i was so horny last night but my girls outta town so i had to spend the night strumming my man banjo
by jonbalbach June 30, 2009
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