slam-door

(UK) Applied to an older kind of passenger train with heavy doors, opened from the inside by reaching out of the window to the handle on the outside.

(UK, old-fashioned) A hinged railway carriage door which opened outwards, that could be opened from the inside only by opening the window and turning the handle on the outside. They originated on carriages with compartments and no corridors, and persisted on later carriage designs with corridors on one side of the compartments, being fitted on the non-corridor side.