MPW is a new slang used bye mature audience defined as my pu**y wet it is described in a sexual way and used too define there vagina being wet and is usually said by a female who vagina is wet or soak
by niela wilson August 24, 2022
mpw is an acronym standing for the term "My Penis When" randomly used in some imageboards and irc channels, it shows a way to express yourself when your penis get shocked, impressed or in someway amused by any image, news or comments.
by Gennosuke October 1, 2011