If a girl is unique and stands out from the crowd, you see that she has something different about her. Literally the act of someone (usually a female) being different.
Can be written Diffin’ (Diffing).
Used in a sentence - The way she walks through and does her own thing, she’s diffin’, she ain’t like those other girls.
DuFFing is a sexual act in which two men simulataneoualy ejaculate on each other's testicles and then proceed to 69 in order to lick their semen off the other mans balls.
Puff and Trent were caught DuFFing at the family gathering. The entire family was shamed by their actions.