In slang|lang=en terms the difference between lockup and lockup
is that
lockup is (slang) a jail, prison while
lockup is (slang) a jail, prison.
In uk|chiefly|lang=en terms the difference between lockup and lockup
is that
lockup is (uk|chiefly) a storage unit with a door secured by a padlock or deadbolt; a garage while
lockup is (uk|chiefly) a storage unit with a door secured by a padlock or deadbolt; a garage.
As nouns the difference between lockup and lockup
is that
lockup is (slang) a jail, prison while
lockup is (slang) a jail, prison.