donkey ears
noun1
A hand gesture made by placing the thumbs above each ear and waving the index fingers in unison; used to express derision.
- This was a frustrating year for us, anyway, and we were losing to the Tigers, 13-0, in the sixth inning when Aaron Robinson popped one into short left. I dropped the fly, they began to boo; and when I came in I gave them the donkey ears, which hardly seemed adequate. My Turn at Bat The Story of My Life by Ted Williams, As Told to John Underwood, p. 116