A cerimonial event performed on Friday nights, by mainly females. It involves doing your *F*ace *E*yebrows and *N*ails. Use a face scrub, do your nails and eyebrows all while pigging out on chocolate and watching Mean Girls.
Girl, watch yo weave, i is gon bout to do mah Fen.
No one bother me, im going to celebrate Fen right now.
*Mom* why are you eating enchiladas with a hamburger and chips and a donut
*Me* Fen, duh.
Hey girl, you wanna go to the movies this fine evening
haha no its Fen tonight