Spoon mode

An extreme state of tiredness or lightheadedness in which someone would burst out laughing at anything and everything, even if it isn't funny.
The phrase was named after the "spoon test" - a method of diagnosing such a state. In the test, the word "spoon" would be uttered randomly and without context to the person in question. If said person would burst out laughing, you know they're in a spoon mode.

Dave was in a total spoon mode yesterday, he even laughed at Emma's jokes.

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