lie-in

lie in — phrasal verb with lie verb [ I ] uk/laɪ/ uspresent participle lying | past tense lay | past participle lain UK
to stay in bed in the morning later than usual

валяться в постели (дольше обычного)
I lay in till eleven o'clock this morning.

LIE-IN noun

[ no plural ] UK uk/ˈlaɪˌɪn/
If you have a lie-in , you stay in bed in the morning longer than usual.

валяние в постели (утром)
I had a long lie-in this morning.