To "finger the bass" means to finger a vagina with skill. Bass guitarists are known to have skilled fingers, and fast hands, and often "finger" the notes to produce the sounds on their instrument. This is also a pun on the word "bass" and "bass", "bass" being short for a bass guitar, and "bass" being a type of fish. Vaginas are often referred to as being "fishy". Haha, great pun, I know!
"So, since you're a skilled bass guitarist, does that mean you'll be good at 'fingering the bass', as it were?"
by J Saville September 29, 2013