The Collaborative International Dictionary of English v.0.48:
Rimple \Rim"ple\, n. [AS. hrimpele, or rimpel. See Rumple.] A fold or wrinkle. See Rumple. [1913 Webster]The Collaborative International Dictionary of English v.0.48:
Rimple \Rim"ple\, v. t. & i. [imp. & p. p. Rimpled; p. pr. & vb. n. Rimpling.] To rumple; to wrinkle. [1913 Webster]