This is a unique usage of the word which is used to describe a smell or a taste. It is difficult to define "bent", but the prototypic example of a bent smell is the way it smells outside after it's been raining a while and there are worms everywhere. Some people say it smells like "raw meat" or "wormy", well that is an example of a bent smell. Another example of a bent smell is the way a metal sink smells after there's been water sitting in it for a while.
When it comes to tastes, people often use the term "gamey" when describing the taste of bent meat. Another excellent example of something that can taste "bent" is if you don't cook chicken well enough.
1. Ew, that chicken I made wasn't cooked enough and it tasted really bent.