littlest thing

The smallest, most trivial, or most inconsequential thing or aspect. She's so sensitive—the littlest things seem to get her in a huff. My boss is such a perfectionist that he will halt production to scrutinize the littlest thing he thinks could be improved.

See also: little, thing

See also:

least little thing
tiniest thing
down to (someone or something)
down to somebody/something
lightweight
huff
be in a huff
not to be sneezed at
not to be sneezed/sniffed at
not to be sniffed at

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