feeling the bacon

"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