ISYMFS

The acronym for I Suck Your Mother's Fingers Slowly.

Term used by MILF lovers and feet fetishists. Often tattooed on different body parts to inform cougars about your preferences.

Woman: Hey is that ISYMFS on Your arm?
Boy: Yes it is.
Woman: Let's go to my house and talk about it.

by MichealQA August 13, 2019