"The Feeling" refers to a type of second-hand embarassment one gets in awkward situations. You may have to look away, walk away or ignore to get rid of the uncomfortable tension in your stomach.
Nerds making out and canoodling in public may give you "the feeling."
If someone tells a story with too many graphic details in front of your boss or parent, you may get "the feeling".
If someone tells a corny joke or anecdote, you may get "the feeling". Same goes for over romantic, nostaglic, or schmaltzy sentiments.
If someone falls, farts, or makes a fool of themself and you are directly next to them, you may get "the feeling."
"Feeling the Bacon": A feeling of overwhelming fatigue and generalized anxiety while working out, caused by eating an unhealthy meal. The phrase does not necessarily mean that the person had bacon, but that they ate poorly and are trying to offset said meal.
Example:
"Hey, how was your run!" - Person A "Oh man, I was feeling the bacon." - Person B "That bad, eh?!" - Person A