1. n. a Caucasian; a white person. (All senses originally black. From Jefferson Davis. Potentially derogatory.) The jeffs are coming around more often. What’s up?
2. n. a boring or square person. Don’t be a jeff, man!
3. tv. to persuade or deceive someone. You’re just jeffing us!
4. in. to gentrify; to take on the ways of whites. Cool it man; stop your jeffing.