In the second quarto, generally considered the most authoritative text for the play, the word is "sallied," which doesn't make good sense. The First Folio has "solid," which fits neatly with the metaphor of the body melting and turning into a dew. However, some editors put "sullied" here, which would indicate that Hamlet feels his own body to be "sullied," or made dirty, by his mother's marriage to King Claudius.