To finger (to stimulate a woman's vagina with the hands and fingers)
The word "finger" has an evil sound do it. It connotates that fingering is a disgusting act. This has a much better sound to it - almost like "romance".
Etymology: hetero-masturbating (masturbating another person) became shortened to romast, and then romass
I had a great time with Hannah last night... yeah, I romassed her. I love her so much.