Well, according to Urban Dictionary, a bug man is "A homosexual who has contracted HIV." I hadn't heard the term before. Could you be hearing "butt man"? This is a man who finds women's butts to be the most attractive part.

I think the expression you heard was probably 'bogey-man' . It's a general term for someone who is scary.

i think that bug means insect in here !cause this movie is about insect man!