center of gravity
n.— «The bread basket, an area of 45 square miles in northeastern Iraq, had been one of Al Qaeda in Iraq’s few remaining “centers of gravity,” as U.S. military commanders termed it—a place the group had fled to once it was forced from Anbar province.» —“After Al Qaeda” by Lennox Samuels Newsweek Jan. 22, 2008. (source: Double-Tongued Dictionary)
Further reading
If you work in tech support, you might use snarky slang for problems caused by computer users themselves. There’s the acronym PEBCAK, for example, which stands for Problem Exists Between Chair and Keyboard. And: a lush poem about the sea inspired by...
The expression to run the traps means “to perform due diligence” or “solicit a wide variety of opinions” or “investigate every angle thoroughly.” This metaphor derives from the literal sense of running the traps, which refers to hunting and fishing...