When a man inserts his penis straight into an unsuspecting victim's ass, no lube required. This may cause pain and discomfort to the end receiver, however this is very common.
Person 1: Where is Tom??
Person 2: Preforming Raw Biscuit on his younger sister...
A person who is white and soft
Damn Leah you look like a raw biscuit today. Well you look like one all the time.