The Collaborative International Dictionary of English v.0.48:

Swamp \Swamp\, v. t. [imp. & p. p. Swamped; p. pr. & vb. n.
   Swamping.]
   1. To plunge or sink into a swamp.
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   2. (Naut.) To cause (a boat) to become filled with water; to
      capsize or sink by whelming with water.
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   3. Fig.: To plunge into difficulties and perils; to
      overwhelm; to ruin; to wreck.
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            The Whig majority of the house of Lords was swamped
            by the creation of twelve Tory peers. --J. R. Green.
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            Having swamped himself in following the ignis fatuus
            of a theory.                          --Sir W.
                                                  Hamilton.
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