{adv. phr.} Until very late at night. * /He is so anxious to pass his exams with flying colors that he stays up studying until all hours./
UNTIL ALL HOURS
Meaning of UNTIL ALL HOURS in English
Slang English vocab. Английский сленговый словарь. 2012
{adv. phr.} Until very late at night. * /He is so anxious to pass his exams with flying colors that he stays up studying until all hours./
Slang English vocab. Английский сленговый словарь. 2012