The Collaborative International Dictionary of English v.0.48:

Clogging \Clog"ging\, n.
   Anything which clogs. --Dr. H. More.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Clog \Clog\, v. t. [imp. & p. p. Clogged (kl[o^]gd); p. pr. &
   vb. n. Clogging.]
   1. To encumber or load, especially with something that
      impedes motion; to hamper.
      [1913 Webster]

            The winds of birds were clogged with ace and snow.
                                                  --Dryden.
      [1913 Webster]

   2. To obstruct so as to hinder motion in or through; to choke
      up; as, to clog a tube or a channel.
      [1913 Webster]

   3. To burden; to trammel; to embarrass; to perplex.
      [1913 Webster]

            The commodities are clogged with impositions.
                                                  --Addison.
      [1913 Webster]

            You 'll rue the time
            That clogs me with this answer.       --Shak.

   Syn: Impede; hinder; obstruct; embarrass; burden; restrain;
        restrict.
        [1913 Webster]

WordNet (r) 3.0 (2006):

clogging
    adj 1: preventing movement; "the clogging crowds of revelers
           overflowing into the street" [syn: clogging,
           hindering, impeding, obstructive]