"to land with a smacking sound," 1897, probably of imitative origin. As a noun from 1958.
updated on November 10, 2013
英语词源词典收录了45867条英语词源词条，基本涵盖了全部常用英语词汇的起源、历史，是研究英语词汇或通过词源学英语的必备工具。