The Collaborative International Dictionary of English v.0.48:

Pimpled \Pim"pled\, a.
   Having pimples. --Johnson.
   [1913 Webster]

WordNet (r) 3.0 (2006):

pimpled
    adj 1: (of complexion) blemished by imperfections of the skin
           [syn: acned, pimpled, pimply, pustulate]