1. A man who was once a hard donny...drinker, rager and all around badass who - due to engaging in an exclusive monogamous relationship- has now become like melted soft serve ice cream relinquishing all of his past friendships and overall beast mentality for a life of Netflix and missionary sexual intercourse.
2. Flaccid penis
Soft donny spends his Friday nights watching Gilmore Girls with his Girl friend.
Last night my boyfriend had a soft donny.
I