know what's o'clock
English
Etymology
Compare Dutch weten hoe laat het is.
Verb
know what's o'clock (third-person singular simple present knows what's o'clock, present participle knowing what's o'clock, simple past knew what's o'clock, past participle known what's o'clock)
- (dated) Synonym of know what is what.
References
- John Camden Hotten (1873) The Slang Dictionary