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1)Milli Vanilli.

2)Ashlee Simpson.

3)a version of lip movement in which a recorded version of a song is being played and a self-described "artist" moves their mouth to the words being sung, stimutaneously dancing in a choegraphed fashion.

4)Fake talent. Also known as acid reflux.
1)"Did you hear about that band Milli-Vanilli that was around before you were born? They started the whole lip-syncing trend. apparently it caught on..."

2)She may have acid reflux, but she can sure do a great hoedown.

3)"And here we have Hilary Duff lip-syncing while looking into a mirror, which serves as the rigerous rehersal for her next tour..."

4)"Hey man, she couldn't sing so she had a right to lip sync! It says so in the rules...."
lip-sync by raquel.w April 19, 2006
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To move one's lips in synchronization with a recorded speech or song
I can't Believe that she would lip-sync to her own song.
lip-sync by Light Joker March 21, 2006
that douche bag was lip-syncing on SNL
lip-sync by koolkas August 12, 2006
Pronounced in Korean as li'pu sinku - a new sub-genre of k-pop (re)invented and used as a method of lucrative musical idol production by Mr. Lee Soo Man, founder and main shareholder of SM Entertainment, South Korea. Representative performer of sub-genre is a boy group EXO. Main feature of sub-genre involves absence of live singing on live performances of the group on the music shows and concerts (except for rare solo or ballad performances) featuring an acrobatic and complex choreography and other visual effects admired by rabid fangirls. Results in over lucrative sales of the digital and physical albums due to the impossibility to otherwise actually hear the music performed.
"Dance and lip-sync were a method to target Asia" - from Lee Soo Man's interview on Korean site.
Lip-sync by Lady Dragon May 28, 2014

Lip sync 

That thing Katy Perry does at her live concerts.
You will now Lip sync for your LIFE. Good luck and don’t FUCK IT UP
Lip sync by Skinnyursula December 5, 2017

Lip Sync 

To move one's lips in synchronization with a recorded speech or song
Why would she lip sync in front of thousnands of people
Lip Sync by cartiervert June 28, 2016

snap chat lip sync 

the act of video recording on the snap chat application to a song without one's own voice but by a pre recorded track. This is usually done in a moving vehicle or on ones couch at home.
I really enjoyed the snap chat lip sync I received from my friend Eli. It really made my day.
snap chat lip sync by moxiefromroxie September 28, 2013
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