What is the meaning of 三味線?

shamisen (Japanese three-stringed instrument)

a Japanese stringed instrument played by plucking, vaguely similar to a banjo

short for 三味線草 (shamisen-gusa): the shepherd's purse, Capsella bursa-pastoris

from 三味線を弾く (shamisen o hiku, literally to play the shamisen): words or actions intended to deceive one's opponent in a game or competition

a grade of (, highest mark, equivalent to an “A” in US schools)

a Japanese stringed instrument played by plucking, vaguely similar to a banjo

Source: wiktionary.org