From Longman Dictionary of Contemporary Englishhip pocketˌhip ˈpocket noun [countable] DCCa back pocket in a pair of trousers or a skirt
Examples from the Corpus
hip pocket• He gave them some thought, then extracted two and stowed them in his hip pocket.• He took to having a daily early-morning nip from a half-bottle of whisky in his hip pocket.• For a moment, Vitor gazed at the ring in his hand, then he slid it into his hip pocket. 