Number One.
Oneself.
To take care of number one, is to look after oneself, to seek one’s own interest; to be selfish.
Oneself.
To take care of number one, is to look after oneself, to seek one’s own interest; to be selfish.
Entry taken from Dictionary of Phrase and Fable, edited by the Rev. E. Cobham Brewer, LL.D. and revised in 1895.