"down to FUCK ass to mouth"
when a girl is willing to take it in the ass and then suck the shit off your dick
this type of girl is also known as "the cash machine" or "MONEY"
*any girl from cottey college
Dirty Dan- "if that girl with the DSLs is DTFATM then she's A-OK with me"
Tyler- "yeah Dirty Dan, my ex girlfriend Heather was always DTFATM"