Dictionary / Vocabulary / 手短に言うと
てみじかにいうと
in brief; to put it succinctly
手短に言うと、君が悪いんだよ。
To put it briefly it's your fault.
講演者は自分の論題がわかっていなかったし、話もうまくなかった、手短に言うと、彼にはがっかりさせられた。
The speaker didn't know his subject, nor did he speak well; in short, he was disappointing.