Source : Webster's Revised Unabridged Dictionary (1913)

Bromide \Bro"mide\, n.
   A person who is conventional and commonplace in his habits of
   thought and conversation. [Slang] -- {Bro*mid"ic}, a. [Slang]

Source : WordNet®

bromidic
     adj 1: given to uttering bromides
     2: dull and tiresome but with pretensions of significance or
        originality; "bromidic sermons" [syn: {corny}, {platitudinal},
         {platitudinous}]