What the DILF?

Today at work I helped two fairly pretty women who must have been drunk and looked like “Girls Gone Wild—Viagra Triangle Season”. They told me all about how they made out with one of my co-workers, about her gay brother that lives in France, got mad at me when I didn’t tell her how pretty she was in her license (require verification when a credit card isn’t signed), that I looked like was 27 (the other one called me out at 40’s---ouch), and then one told me “You’re totally a DILF”.

I looked at them with a look of confusion as they giggled and left the store.

What the hell is DILF? *scratch head*