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1. n. (bad) body odor. (Initialism.) Man, do you have BO!
2. n. box office, where tickets to some event are sold. If you want your money back, you’ll have to go to the BO.
3. n. HBO, Home Box Office, the cable television channel. (Initialism and dysphemism based on sense 1) There is boxing on BO but no movie.
n. a deodorant; an underarm deodorant. (see also BO.) Help this man find his BO juice, fast! He really needs it.