Something that is finished and ready to go. A car that has been completely restored and every detail is flawless. Being ready to go on a trip, bags packed, passport in hand, money in pocket.
Damm, look at that chevy, that things turn key.
Were leaving at 3 pm, you better be turn key or we will leave your ass.
A correctional officer
Hey turn key, this toilet is stopped up; may I use another cell.