vinaigrette slider

When, during the act of fellatio, the giving partner gags on the penis of the receiving partner and vomits a small amount of stomach acid, mucus, and saliva onto the penis. This "vinegary" liquid is then used to further facilitate the fellatio and/or masturbation as an added lubricant. When depicted on video, this vinegary substance is typically spit aggressively at the receiving penis before being re-incorporated into the sexual act.