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Longman Dictionary of Contemporary English
love nest
noun
EXAMPLES FROM CORPUS
▪ Fancy taking you to that tired old love nest.
▪ Only last week he bought a £550,000 love nest in Henley-on-Thames, Oxon.
▪ She tracked his middle-aged mistress to a caravan-site love nest only two miles from her bungalow home.
▪ That apartment is goddamn love nest, right?
▪ The love nest he had conjured out of so little would make up for all her pain.
▪ The dingy flat in Cleghorn Street had been transformed into a cosy little love nest.
▪ Their love nest is the master suite of a glitzy private residence in a new gated Big D community.
Wiktionary
love nest

n. (context idiomatic colloquial English) A residence, especially a condominium or cabin, where a couple (particularly a newly married couple) can enjoy each other's company.

Wikipedia
Love Nest

Love Nest is a 1951 American comedy-drama film directed by Joseph Newman and starring June Haver, William Lundigan, Frank Fay, Marilyn Monroe, and Jack Paar.

The post-World War II comedy features an early supporting role for Monroe. It is one of the few films Paar made prior to his television career, and the last film appearance by Fay, who had been a popular stage comedian in 1920s and revived his career starring in the long-running Broadway comedy Harvey. It was also the last appearance by silent star Leatrice Joy.

The film borrows its name from the popular old song Love Nest with music by Louis Hirsch and lyrics by Otto A. Harbach. The song is sung by a chorus over the opening credits and was used as a theme song for The Burns and Allen Show on both radio and TV.