an acronym for Male(s) Acting Childish, Hormonal (and) Obnoxious. used with a touch of sarcasim. Example: random guy is picking on someone. observer: oh, how m.a.c.h.o.
M.A.C.H.O.
Meaning of M.A.C.H.O. in English
Slang English vocab. Английский сленговый словарь. 2012