Usually an unexpected precursor signal from your stomach to your sphincter informing your hole that you are about to release a Hendren ( A giant turd )
Tony suddenly doubled over in discomfort while sitting in the back seat. He was suffering from Shit Pains and needed to drop loaf ASAP.
(noun)Painkilling pain pills. Narcotic opiods, usually referring to the lower grade hydrocodone persuasion such as loratab or loraset, but can also include oxycodone, morphine, etc.
When hard up for a buzzFelix would take all the painers he could get his hands on.