hyp

Short for hypochondria, hyp is an old-school abbreviation describing the obsessive, anxious belief that you're seriously ill when you're probably just fine. While the full word has gone clinical, hyp still pops up in casual speech when someone is dramatically convinced every headache is a brain tumor or every sniffle is the plague. It captures that particular blend of anxiety and self-drama without the full medical jargon.

Hypochondria.

(mathematics) A hypotenuse.

(colloquial, dated) To make melancholy.