lip sync; lip-syncing
Refers to the act of moving the lips in synchronization with a pre-recorded audio track, often in performances or videos.
あの歌手はコンサートでリップシンクをしていたと噂されている。
That singer is rumored to have been lip-syncing at the concert.
動画編集でリップシンクを合わせるのは難しい。
Matching lip sync in video editing is difficult.
Variant with interpunct; less common but seen in some contexts.
Loanword from English 'lip sync'.