sleep something ↔ off phrasal verb informal ( see also ↑ sleep )
to sleep until you do not feel ill any more, especially after drinking too much alcohol:
He went to his room to sleep it off.
sleep something ↔ off phrasal verb informal ( see also ↑ sleep )
to sleep until you do not feel ill any more, especially after drinking too much alcohol:
He went to his room to sleep it off.
Longman Dictionary of Contemporary English. Longman - Словарь современного английского языка. 2012