When you wash clothes, both colours and whites or lights and darks, all together in one washing load when doing the laundry, whilst not using a colour catcher.
Person 1: oh no, all my clothes have mixed colours!
Person 2: did you use a colour catcher or separate colours?
Person 1: nah, i did some bareback laundry. now all my clothes are ruined
Person 2: bad times.