muso
/ˈmjuːzəʊ/noun
(pl. -os)
1- Brit. informal a musician, especially one over-concerned with technique〈英, 非正式〉乐师（尤指格外注意技巧者）。
1.1
- a keen music fan, especially one who has expensive hi-fi equipment（尤指有昂贵高保真音响设备的）音乐迷。
词源
1960s: abbreviation.