Silver back action is the term used for a male who has used weight training to build muscle on their lower pectoral, resembling a silver back gorillas muscular chest.

Also known as man boob muscle

When during a sloppy blowjob the blower gags twice then vomits profusely, whilst tossing their head back, either causing a mess or an orgasam. The 4 Billion referring to how many nightmares the blowee will be having.