(V.) To Old Gregg on someone is to hit on someone very creepily and awkwardly, usually in an attempt to get that person to do something he or she doesn't want to do but that you do.
Effective examples of old gregging include:
1. throwing out continuous strains of awkward, senseless questions, such as: "do you want to go to a club where people wee on each other?" or "do you ever drink baileys from a shoe?"
2. Do you want to see my mangina?
3. You got your rod stuck in my head motherlicka