all in, be

1

Be tired out, exhausted, as in I can't walk another step; I'm all in. [Slang; second half of 1800s]

2

In card games, especially poker, be out of money, as in I'm finished for the night; I'm all in. It refers to having put all of one's money in the pot. In his historical dictionary of slang, J.E. Lighter suggests that the gambling usage, first recorded in 1907, may be the source of the first sense.

Words nearby all in, be

all in, all in a day's work, all in all, all in good time, all in one piece, all in, be, all joking aside, all kinds of, all of, all of a sudden, all of the above