MIFID Acronym: Mother I'd Fuck If Drunk
Pertaining to a MILF who doesn't quite meet the "Stifler's mom" grade.
Ropey milfs that you would only sleep with after hitting the brandy (because you drank all the lager)
"You slept with Ryans mum? Man, she's a total MIFID, you must have been wasted! Was she good?"
"I can't remember."