An acronym for "Big Dirty MILF Tits".
Used to privately refer to the large breasts of older, more mature women either surgically enhanced or naturally of good size.
Often pluralised to BDMTs to refer to both breasts on a single MILF, or a group of MILF with large breasts.
"Dude, did you check out Lorraine on reception earlier?"
"Yeah man, those are some tasty looking BDMTs"
1. Have you seen Roland's new woman? He sure does love those BDMT's!
2. BDMT's?
1. Big Dirty Milf Tits!
2. Aight.