Mother I Don't Like to Fuck. A mother who is so ugly you don't want to place your penis anywhere near her. The opposite of a MILF.
Person: I hear our friend's mom is a MILF!
Person2: really? oh, wait thats not a MILF, thats a MIDLF.
Person2: really? oh, wait thats not a MILF, thats a MIDLF.
by Mr. Zimpy November 23, 2009