口くちピMeanings1nounlip piercingslangabbreviationSlang abbreviation of 口ピアス. Used in casual conversation among young people.See also: 口ピアス昨日きのう、口くちピ開あけたんだ。I got a lip piercing yesterday.口くちピって痛いたそうだけど、かっこいいよね。Lip piercings look painful, but they're cool, aren't they?