a burr under your saddle
a burr under (one's) saddle
A source or cause of intense and persistent annoyance or irritation. The traffic delays resulting from construction of the new inter-city tramline has been a burr under residents' saddles for months now. I'm not trying to be a burr under your saddle; I'm just ensuring we are following the letter of the law every step of the way.
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.
a burr under (or in) your saddlea persistent source of irritation. North American informal
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