Source : Webster's Revised Unabridged Dictionary (1913)

Bog \Bog\, v. t. [imp. & p. p. {Bogged}; p. pr. & vb. n.
   {Bogging}.]
   To sink, as into a bog; to submerge in a bog; to cause to
   sink and stick, as in mud and mire.

         At another time, he was bogged up to the middle in the
         slough of Lochend.                       --Sir W.
                                                  Scott.

Bog \Bog\, n. [Ir. & Gael. bog soft, tender, moist: cf. Ir.
   bogach bog, moor, marsh, Gael. bogan quagmire.]
   1. A quagmire filled with decayed moss and other vegetable
      matter; wet spongy ground where a heavy body is apt to
      sink; a marsh; a morass.

            Appalled with thoughts of bog, or caverned pit, Of
            treacherous earth, subsiding where they tread. --R.
                                                  Jago.

   2. A little elevated spot or clump of earth, roots, and
      grass, in a marsh or swamp. [Local, U. S.]

   {Bog bean}. See {Buck bean}.

   {Bog bumper} (bump, to make a loud noise), {Bog blitter},
   {Bog bluiter}, {Bog jumper}, the bittern. [Prov.]

   {Bog butter}, a hydrocarbon of butterlike consistence found
      in the peat bogs of Ireland.

   {Bog earth} (Min.), a soil composed for the most part of
      silex and partially decomposed vegetable fiber. --P. Cyc.

   {Bog moss}. (Bot.) Same as {Sphagnum}.

   {Bog myrtle} (Bot.), the sweet gale.

   {Bog ore}. (Min.)
      (a) An ore of iron found in boggy or swampy land; a
          variety of brown iron ore, or limonite.
      (b) Bog manganese, the hydrated peroxide of manganese.

   {Bog rush} (Bot.), any rush growing in bogs; saw grass.

   {Bog spavin}. See under {Spavin}.

Source : WordNet®

bog
     n : wet spongy ground of decomposing vegetation; has poorer
         drainage than a swamp; soil is unfit for cultivation but
         can be cut and dried and used for fuel [syn: {peat bog}]

bog
     v 1: cause to slow down or get stuck; "The vote would bog down
          the house" [syn: {bog down}]
     2: get stuck while doing something; "She bogged down many times
        while she wrote her dissertation" [syn: {bog down}]