Other usage: on purpodent, purpodental
Joe: *trips while trying to jump over a bench - everyone laughs - he jumps up*
Mary: Nice bail Joe!
Jim: You okay?
Joe: Yeah, I did it purpodentally to make you laugh!
Mary: *aiming for a target with her bow and arrow, shoots and misses the target, but hits the tree, knocking down a frisbee that's been stuck for 10 years*
Jim: You missed!
Joe: Yeah but we got our frisbee back! SCORE!
Mary: Thanks, it was purpodental.