The idiom all in is commonly used to express a state of complete exhaustion or fatigue.

Meaning of “all in

All in means feeling so tired that one is drained of energy or strength. This phrase is often used informally to describe physical or mental exhaustion after a strenuous activity.

Examples of “all in” in sentences

I just walked all the way from town. I’m all in.
(Walking a long distance has left the person extremely tired.)

“What a day!” said Sally. “I’m all in.”
(After a busy, tiring day, Sally expresses her exhaustion.)

He stayed up all night studying for his exams and now he’s all in.
(The lack of sleep has completely worn him out.)

    When to use “all in

    • Use this idiom when describing feelings of extreme tiredness, whether due to physical activity, lack of sleep, or a mentally demanding day.
    • It’s a casual phrase often said in response to someone asking how you’re feeling after a demanding task or day.

    Equivalent expressions

    Similar expressions to all in include:

    • Wiped out: Commonly used to describe complete fatigue or depletion of energy.
    • Exhausted: A more formal term for feeling extremely tired.
    • All tuckered out: An informal and somewhat folksy expression for being very tired.

    The phrase all in effectively conveys a sense of total fatigue, making it a fitting choice when you’re utterly spent and ready to rest.

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