too big for one's britches

(redirected from too big for one's boots)

too big for (one's) britches

Overconfident in one's importance, skill, or authority; behaving as if one is more important or influential than one actually is. He's gotten too big for his britches ever since he got that promotion. John's been too big for his britches now that he's been scouted by pro teams.
See also: big, britches, for
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.

too big for one's britches

Also, too big for one's boots. Conceited, self-important, as in Ever since he won that tournament he's gotten too big for his britches, or There's no talking to Jill anymore-she's just too big for her boots. This metaphoric idiom alludes to becoming so "swollen" with conceit that one's pants or boots no longer fit. [Late 1800s]
See also: big, britches, for
The American Heritage® Dictionary of Idioms by Christine Ammer. Copyright © 2003, 1997 by The Christine Ammer 1992 Trust. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
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References in periodicals archive ?
One lesson to be learnt from the demise of the late lamented crop of dinosaurs is that it never pays to grow too big for one's boots. And if, for some unfathomable reason, a being is obliged to expand, it would be advisable to ensure that the growth takes place in a balanced fashion.