Clammy \Clam"my\, a. [Compar. {Clammier}; superl. {Clammiest}.] [Cf. AS. cl[=a]m clay. See {Clam} to clog, and cf. {Clay}.] Having the quality of being viscous or adhesive; soft and sticky; glutinous; damp and adhesive, as if covered with a cold perspiration. [1913 Webster]