banjo string

plural banjo strings

1. UKslangvulgarThe frenulum of the penis.

   My banjo string snapped the other day, there was blood everywhere!

   1994 November 9, K.J. DREA, “Banjo string snapped!”, in alt.banjo (Usenet)

   2 more examples

   Tell someone you've cut your frenulum and the chances are you'll get a blank look. But if you mention - to a man at least - that you've snapped your banjo string, he'll wince in sympathy.

   2002 February 28, Jonathan Cope, “Ouch!”, in The Guardian

   And also, can please nobody mention that I snapped a man's banjo string whilst making love to him on a table, which resulted in him being deported?

   2016 March 28, Tony Roche, 13:20 from the start, in Fresh Meat, season 4, episode 6 (television production), spoken by Melissa "Oregon" Shawcross (Charlotte Ritchie), Channel 4

2. Used other than figuratively or idiomatically: see banjo, string.