"You canker blossom!" 3 Shakespearean Insults
early 16c. (implied in cudlyng), perhaps a variant of obsolete cull, coll "to embrace" (see collar (n.)); or perhaps from Middle English *couthelen, from couth "known," hence "comfortable with." It has a spotty early history and seems to have been a nursery word at first. Related: Cuddled; cuddling.