From lip sync.
- (music, singing) To move lips in synchronization with sounds (generally recorded) so it appears they are the source of the sounds.
She lip-synced to her own recording during the show because of her laryngitis.
There was a great scandal when it was discovered the singer had been only lip-syncing.
2013 September 23, Masha Gessen, “Life in a Russian Prison”, in New York Times, retrieved 24 September 2013:
- Tolokonnikova is one of two members of the punk group Pussy Riot who are serving two-year sentences for lip-syncing and playing air guitar for 40 seconds in a peaceful protest in the largest Moscow cathedral.
to move lips in synchronization with sounds