break (one's) arm patting (oneself) on the back

break (one's) arm patting (oneself) on the back

To excessively praise oneself for an achievement or a job well done. Tony was instrumental in the success of the merger—or so he says. He's going to break his arm patting himself on the back.
See also: arm, back, break, on, pat
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.
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