TBDL /ˌtiːˌbiːˌdiːˈɛl/ noun2 •(informal) A teenager who engages in ABDL practices; an adult baby, ageplayer or diaper lover who is a teenager.yo im 18 m and a TBDL from vancouver canada, ok well surrey but its close enough no one from any other place besides the lower main land knows where surrey is 😝. — 2006 •ABDL practices involving teenagers; especially (literature) fiction involving such themes or practices.Hey everyone! So a couple of weeks ago I was browsing on Fetlife and there was a group of ABDL/TBDL people who formed a group for my area. I was surprised there was people in my area into this! — 2015 formsTBDLs