Origin: 1555–65; akin to MD zimperlijc, dial. Dan simper affected, Dan sippe affected woman, orig. one who sips (see sip), a way of drinking thought to be affected
sim·per (sĭm'pər) v.
sim·pered, sim·per·ing, sim·pers
v.
intr. To smile in a silly, self-conscious, often coy manner. v.
tr. To utter or express with a silly, self-conscious, often coy smile: simpered a lame excuse. n. A silly, self-conscious, often coy smile.
[Perhaps of Scandinavian origin.] sim'per·er n., sim'per·ing·ly adv.