Expressions (phrases, clauses, etc.), Adverb (fukushi)
brazenly; shamelessly; unashamedly; unabashedly; impudently; audaciously
まあその、自慢できる事でもないんだけど。というか、臆面もなく吹聴できる話でもない。Well, that is, it's not something I can boast about. In fact, it's not something I can talk about in public without shame
Also written 臆面も無く【おくめんもなく】