What is the meaning of Brits?

plural of brit

a berth, a bunk

a Briton, a British man, a man born in Great Britain; a citizen of the United Kingdom

: British; pertaining to Great Britain or the United Kingdom and its people

an Englishman

the Britons, members of the Celtic tribes that lived in southern Britain at the time of the Roman conquest

cot (simple bench to lie down on)

Source: wiktionary.org