It means to talk nonsense, chatter.
To maunder; to talk foolishly; to chatter. Scot. --Sir W. Scott.
Painting a log pink , while being naked and drinking canada dry giner.
http://www.urbandictionary.com/define.php?term =Haver
(Scottish) talk foolishly; babble. 2 Brit. act in an indecisive manner.
http://www.askoxford.com/concise_oed/haver?vie w=uk
chiefly British : to hem and haw
http://www.m-w.com/cgi-bin/dictionary?book=Dic tionary&va=haver
to hesitate, To maunder; to talk foolishly; to chatter; talking nonsense; foolish; babble
http://en.wiktionary.org/wiki/Haver
to equivocate; vacillate.
Noun (Hebrew) - friend; comrade; companion.
http://www.infoplease.com/dictionary/haver
(n.) A possessor; a holder, The oat; oats.
http://www.onelook.com/?other=web1913&w=Haver
A surname (very rare: popularity rank in the U.S.: #22220)
http://www.rhymezone.com/r/rhyme.cgi?Word=Have r
To be slow or hesitant in making a decision.
http://www.allwords.com