FISH

From Airsoft Community Wiki

FISH is an acronym for 'Fighting In Someone's House', referring to CQB combat within residential dwellings. It is similar to FIBUA in definition. Examples of where FISH takes place include the infamous SAS 'Killing House' and buildings at MOD training grounds such as Copehill Down Village.

Sometimes the triumphant shout of a good player: 'First In Still Here!'