all in meaning

Adjective: all in

1. Very tired
   "was all in at the end of the day"
   - beat, bushed, dead

See also: tired

Encyclopedia: All in

[American idiom]
tired; exhausted.
• I just walked all the way from town. I'm all in.
• ""What a day!"" said Sally. ""I'm all in.""

[American slang]
completely tired.
  I'm all in. I need some rest.
  After their 10-mile hike the campers were all in and very hungry.

[Finance]
Refers to an issuer's interest rate after accounting for commissions and various related expenses.

Examples

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1. he was of no use at all in the business.
2. the things on the table were all in a jumble.
3. we were all in our wartime infancy.
4. he was all in at the end of the race.
5. the chestnuts in paris were all in bloom.