A person prone to mewling; whining and complaining about things so pathetically that it brings to mind an abandoned kitten, terrified of the world and unable to do anything about it except mewl.
"Ben backed out of the Glastonbury again this year. He said it's too much of a slog and that he just doesn't know if he can do it any more".
"God, what a mewler".
"Yup. He loves to mewl".
