Top definition
1. when an individual moves their mouth in sync with a song in order to pretend that they are actually singing the song... think Ashley Simpson. yup
2. kissing
Wow, Kanye West is getting heat for singing terribly on SNL the other day (Love Lockdown)

Yeah, it's better though than lip syncing than Ash and Brit

by junebugtnt December 27, 2008
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2
When an individual is being deepthroated by a penis while trying to sing a song
Me and my girl were lipsyncing last night, she was gagging singing Adele
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