Time set aside for yourself, just for relaxing, or possibly masturbating alone in a dark living room. Alternatively, it can mean just about anything.
1. "Ahhhhh, it's finally hind-time..."
2. "Man, after work today I'm on total hind-time"
3. "Hey Fred, after we rape and kill this drifter we're going to require some serious hind-time."
4. "Is this hind-time or beef bullion, or possibly neither or both?"