Lipsyncing 

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

Lipsyncing by I can't believe it's farrell June 24, 2016

lip syncing 

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

lip syncing by junebugtnt December 28, 2008

Lip-Syncing 

The act of females connecting through the spreading of their legs and experiencing the touch of each one’s synchronism of their labias

Females scissoring meaning their lower lips are lip-syncing because they are synchronizing with their lips

Lip-Syncing by ShortShuffle24 September 11, 2025