topic adjacent

Something that relates only slightly to the matter or topic at hand; peripherally.

Bradley was talking about how El Niño always floods Los Angeles, then he immediately brought up how much of an idiot Donald Trump is. Because Trump was visiting Los Angeles at the time, Ian said that the segue was in fact topic adjacent.

fat adjacent

Not fat but not skinny

That guy is fat adjacent

adjacent crowd

The crowd that sits next to and talks to the "in" crowd but they don't talk to you.

I talked to Emily because she's got cool hair, but she knows I'm in the adjacent crowd so she just walked away slowly.