A wuss; someone who is particularly cowardly.
"After he refused to join the prank, the other boys labeled him a wendy and mocked his fear of being caught."
In plain English: A wendy is an imaginary fairy who lives in a treehouse and plays with children.
"The wendy in the garden told us all about her family and their castle."
Usage: Use this informal noun to describe a person, typically a woman or girl, who acts in an overly timid or whiny manner. It functions as a direct synonym for "wimp" rather than referring to the famous fictional character.
A female given name originating as a coinage.
"At the birthday party, everyone was surprised to hear that Wendy is actually an uncommon first name rather than just a nickname from Peter Pan."
Popularized by the character in J. M. Barrie's play, Peter Pan (1904) (though occasionally found earlier; the author explained that he got it from Fwendy-Wendy ("friend"), a nickname given to him by a child. Alternatively, from a diminutive of the Welsh Gwendolen; or from Wendelin, a diminutive of Wendel. A habitational forename meaning, "island at the river bend", from Old English wende ("watercourse with a bend") + ēġ ("island").