Words That Could Mean What They do But Should Mean Something Else

I know what the word "churlish" means but it always makes me think of a question my college roommate used to ask. Namely: "If you eat yogurt and then drink beer, will the yogurt curdle in your stomach?" It's too active yet sinister a word to describe surliness. This is more appropriate:

Churlish

1. Noun - yogurt curdling in one's intestine

2. Verb - the act of yogurt curdling in one's intestine.

Same with fibrous. It sounds like a British 70s Herringbone design.

Like this (say it with a British accent): "I bought a fibrous jacket yesterday at Harrods , then wore it to my interview at Sothebys."