whipper-snapper

n (dated infml derog 旧, 口, 贬) young and unimportant person who behaves in a cheeky or over-confident way 厚颜无耻的或妄自尊大的年轻人.

whichever, whiff, while, while away, whilist, whilst, whim, whimper, whimsical, whimsicality, whimsically, whimsy, whin, whine, whinny, whip, whip-round, whipcord, whiplash, whipper-in, whippet, whipping, whipping cream, whipping-boy, whippy, whirl, whirligig, whirlpool, whirlwind, whirr (also esp US whir), whisk, whisker, whiskered, whisky, whisper, whispering campaign, whist, whist drive, whistle, whistle-stop,