The Collaborative International Dictionary of English v.0.48:
Sop \Sop\, v. t. [imp. & p. p. Sopped; p. pr. & vb. n. Sopping.] To steep or dip in any liquid. [1913 Webster]WordNet (r) 3.0 (2006):
sopping adv 1: extremely wet; "dripping wet"; "soaking wet" [syn: soaking, sopping, dripping]