2.The act of getting fucked, being fucked over, or fucking someone over.
3. doing something shitty or simply being a dick
See also : Mother neffer & neffed up
1. the Falcons got neffed! by the Giants the other night in 24-2 blow out.
2. You mother-neffer! you ate the last slice of pizza
3. if you get left at the alter that neffed up.
4. having sex with someone and not disclosing
venereal diseases means you'll be neffed for life.
5. thus far the ultimate neff is inviting a girl to a lake house and then neffing her wing man... in the ear
- the wing man becomes a mother-neffer leaving the other girl to be NEFFED by the circumstances