CLAMMY Meaning of CLAMMY in English adj. (clammier, clammiest) 1 unpleasantly damp and sticky or slimy. 2 (of weather) cold and damp. clammily adv. clamminess n.[ ME f. clam to daub ] Concise Oxford English dictionary. Краткий оксфордский словарь английского языка. 2012