A hugh expulsion of flatulence that causes the mussels of the glutumus maximus to slap together. Often used as a independent demonstrative expression of awe or pride of accomplishment.
Wheew...that was a realcheek slapper! or
Wait for it...now THAT was a real cheek slapper!
Pajama casual is a term used when working from home and preparing for a video conference. All business above the waist and your pajama pants down below.