A literal explanation of the act of passing a particularily raunchy fart into the atmosphere. Named after a particularily bad Toronto Maple Leaf trade for Lee Stempniak which saw Alexander Steen and Carlo Colaiacovo leave Toronto, in an effort to pick up the goal scorer. Stempniak did nothing all season, while the two traded players flourished.
The Leafs really Stempniak'd themselves!
Man lifts his leg, lets go a raunchy sounding fart and exclames "I just Stempniak'd"
Can also be used to describe ones piece of work.
"That deck looks like someone Stempniak'd on it"