Represents a description of woman, most likely the mother of a close friend, in a given point of time. MIFs are women who used to be known as MILFS. Mother I Fucked!
1.I enjoyed her transition from a MILF to a MIF very much.
2. Dude, did your mom tell you she aint a MILF any more?
3. Steve, I finally did Maja. - Whoww.. so she turned from a MILF into a MIF.