Source : Webster's Revised Unabridged Dictionary (1913)

Squelch \Squelch\, v. i. [Perh. imitative. Cf. {Squelch}.]
   To make a sound like that made by the feet of one walking in
   mud or slush; to make a kind of swashing sound; also, to move
   with such a sound.

         He turned and strode to the fire, his boots squelching
         as he walked.                            --P. L. Ford.

         A crazy old collier squelching along under squared
         yards.                                   --W. C.
                                                  Russell.

Squelch \Squelch\, v. t. [imp. & p. p. {Squelched}; p. pr. & vb.
   n. {Squelching}.] [Cf. prov. E. quelch a blow, and quel to
   crush, to kill.]
   To quell; to crush; to silence or put down. [Colloq.]

         Oh 't was your luck and mine to be squelched. --Beau. &
                                                  Fl.

         If you deceive us you will be squelched. --Carlyle.

Squelch \Squelch\, n.
   A heavy fall, as of something flat; hence, also, a crushing
   reply. [Colloq.] --Hudibras.

Source : WordNet®

squelch
     n 1: a crushing remark [syn: {put-down}, {squelcher}, {takedown}]
     2: an electric circuit that cuts off a receiver when the signal
        becomes weaker than the noise [syn: {squelch circuit}, {squelcher}]
     v 1: suppress or crush completely; "squelch any sign of dissent";
          "quench a rebellion" [syn: {quell}, {quench}]
     2: make a sucking sound
     3: walk through mud or mire; "We had to splosh across the wet
        meadow" [syn: {squish}, {splash}, {splosh}, {slosh}, {slop}]
     4: to compress with violence, out of natural shape or
        condition; "crush an aluminum can"; "squeeze a lemon"
        [syn: {squash}, {crush}, {mash}, {squeeze}]