Piespank
Putting in the final, vigorous effort to finish a task. Derived from the act of rapidly spanking a clitorus to achieve orgasm.
Bill: "Dude, that bolt is totally rusted. I (urgh) can't (urgh) get it to break loose!"
Fred: "You're almost there, dude! Piespank it!"
Fred: "You're almost there, dude! Piespank it!"