Very attractive; pretty; dishy(first form 1920s+, second 1940s+)
The Dictionary of American Slang, Fourth Edition by Barbara Ann Kipfer, PhD. and Robert L. Chapman, Ph.D. Copyright (C) 2007 by HarperCollins Publishers. Cite This Source
Idioms and Phrases with cute as a button
cute as a bug's ear. Pretty or attractive in a dainty way, as in That baby is cute as a button. Cute originally was a shortening of acute, for “sharp-witted and clever,” but in the early 1800s it also took on its current meaning. Other than that buttons and bug's hearing organs can be small, there is no good explanation for these similes.