Best definition
The art of a women wacking off a man in the past tense.

Kurt: Sup man, you didnt get home till like 5am this morning. What happened with you and Magie last night??

Nate: Not much man, just watched some TV and thats it.

Kurt: Come on dude, you had to have gotten something. Shes not a prude.

Nate: Fine, I just got a little wacktion last night. Nothing to write home to the parents about.