A sarong party milf is a Singaporean wife and mother who having had kids, finds her local husband is unable to support her trophy wife/tai tai lifestyle and is thus chasing a white husband.
Person 1: Scarlett is a total sarong party milf. Look at her grinding all over that American stud with her husband in the other room.
Person 2: I heard it's because she thinks her husband isn't giving her the tai tai lifestyle
Person 1: I'm sure the big white dick doesn't hurt either