bunking in

Verb

bunk in (third-person singular simple present bunks in, present participle bunking in, simple past and past participle bunked in)

1. (UK, slang) To enter a venue covertly, without permission.
   • Bunking in had to be abandoned when we reached the age of twelve, not because of any developing sense of civic responsibility, but because we'd grown too big to squeeze through the gents' toilet window at the Red Hall Cinema […]2004, Harry Turner, Growing Up in Fulham, page 179