Source : Webster's Revised Unabridged Dictionary (1913)

Slabber \Slab"ber\, v. t.
   1. To wet and foul spittle, or as if with spittle.

            He slabbered me over, from cheek to cheek, with his
            great tongue.                         --Arbuthnot.

   2. To spill liquid upon; to smear carelessly; to spill, as
      liquid foed or drink, in careless eating or drinking.

            The milk pan and cream pot so slabbered and tost
            That butter is wanting and cheese is half lost.
                                                  --Tusser.

Slabber \Slab"ber\, n.
   Spittle; saliva; slaver.

Slabber \Slab"ber\, n. [See 1st {Slab}.] (Mach.)
   (a) A saw for cutting slabs from logs.
   (b) A slabbing machine.

Slabber \Slab"ber\, v. i. [imp. & p. p. {Slabbered}; p. pr. &
   vb. n. {Slabbering}.] [OE. slaberen; akin to LG. & D.
   slabbern, G. schlabbern, LG. & D. slabben, G. schlabben,
   Icel. slafra. Cf. {Slaver}, {Slobber}, {Slubber}.]
   To let saliva or some liquid fall from the mouth carelessly,
   like a child or an idiot; to drivel; to drool. [Written also
   {slaver}, and {slobber}.]

Source : WordNet®

slabber
     v : let saliva drivel from the mouth; "The baby drooled" [syn: {drivel},
          {drool}, {slaver}, {slobber}, {dribble}]