Definition of too big for one's britches
- I think the boss is growing too big for his britches.
: besides, also
: to an excessive degree : excessively
: to such a degree as to be regrettable
: of great strength
: of great force
: large or great in dimensions, bulk, or extent
: in a loud or declamatory manner
: to a large amount or extent
: on a large scale
: an individual or organization of outstanding importance or power
: a big player : a center or forward whose large size and strength are used to control play near the basket
: breeches, trousers
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