いい加か減げんにする

expression, suru verb (irregular)

put an end to; quit doing excessively; get over with

Used to tell someone (or oneself) to stop doing something that has gone on too long or is excessive. Often carries a tone of exasperation or finality.

• もういい加か減げんにしてくれ！

  Enough already! / Cut it out!

• そろそろいい加か減げんにしないと、体からだを壊こわすよ。

  If you don't stop soon, you'll ruin your health.