burgerkleding

listen to the pronunciation of burgerkleding
Нидерландский Язык - Английский Язык
civvies
{i} civilian clothes (as opposed to military uniform)
civilian clothes (of a military, or former military person)
civilian garb as opposed to a military uniform
People in the armed forces use civvies to refer to ordinary clothes that are not part of a uniform. They might have been soldiers in civvies. ordinary clothes, rather than military uniform (civilian)