Green’s Dictionary of Slang

(US campus) a bohemian.

1958		J. Davis College Vocab. 5: Bo or Boho — Bohemian — A nonconformist, usually an Art or Speech and theater major [HDAS].
1987		in Delacoste & Alexander Sex Work (1988) 85: I saw George once a week on Thursdays when the Bohemian Club had its weekly meetings [...] Frenchy would take me to the bar and introduce me to the Bo’s.
2002		www.indra.com 🌐 Bo the bohemian, took his name from the public access site of bohemia, where he still receives mail.