do stuff, unfair meddling

Obama Defends Restrained Response to Russian Hacks

By MARK LANDLER and DAVID E. SANGER

• President Obama said he refrained from aggressive public retaliation against Moscow for hacking the D.N.C. before the election because he did not want it to be seen as unfair meddling.
• He said he warned Russia, “We can do stuff to you.”

do stuff

do your stuff

to do something that you are expected to do She came on stage, did her stuff, and wasout of the theater within an hour.

Usage notes: usually said about something that you do well