filet, n. — Green’s Dictionary of Slang

filet n.

[Fr. filet de boeuf, fillet steak + ? joc. ref. to lay n.² (1)]

(US campus) a very attractive young woman.

1989		P. Munro Sl. U. 78: filet girl, cute girl.
2000		Indep. 8 Jan. 5: I can’t blame him because his wife is very thin. She’s got a lot of money but she’s not really filet mignon is she?