jean rub
When you are high on MDMA and decide to rub your jeans for the magic feeling that ensues.
Christian jean rubbed his legs to a bloody pulp.
alabama over-the-jeans ballsack rub
When a girl gently massages your balls over your denim jeans. Usually done in foreplay.
Before me and my girl had sex, she gave me an alabama over-the-jeans ballsack rub.