taking a very painful shit that makes you scream in pain, most likely from eating a lot of taco bell.
laine: why is he screaming in there?
tricia: probably choir practice.
laine: oh yeah.
By Sharl
CHOIR PRACTICE
Used in Law Enforcement, Police etc. to indicate to fellow co-workers that they will be meeting after the shift to indulge in some liquid refreshments. (May even be stated over the car radios to alert the entire shift)
Guy 1:I have choir practice Guy 2:You know choir practice just means going poop in the McDonald's bathroom
Guy 3: I can McPoop wherever I McWant, McBitch