when someone is single and looking to date somebody from their past. The person in which they are seeking to date does not have to be an ex boyfriend/girlfriend but someone that they have talked to before.
Andrew: "Damn so I was talking to Jamie last night and I'm thinking of asking her out again"
James: "Dude! stop trash digging! Once it's in the trash don't pick it up again!"
Trash dentist is a character in the song novacaine by ghost and pals and creep-p, Trash dentist has no official gender, trash dentist is the worst dentist ever even ripped tooth HURTYS jaw off