1. Mack is a short from of MacIntosh, a waterproof overcoat, named after its inventor.
To “get your mac on” means to stay dry.
2. Mack is a euphemism for a condom, another form of waterproof overcoat.
To “get your mac on” at the severe end of petting is an invitation by a woman to the guy to have sex with a condom on.
1. Mum- It’s raining so, get your mac on.
2. Your honour, she broke away from my passionate kiss while I was trying to penetrate her, and she said “get your mack on”. I stopped and fiddled around till I had the condom on. So how can she now complain that sex was not consensual?
But son, how do you account for her hands and feet tied to the bed!