Quick Sack

1. To run in, stick in the penis, ejaculate, and quickly exit.

2. Term often substituted by "Quickie". A Quick Sack is where one quickly gets another in a "Sack" and proceeds to intercourse... Quickly.

"She wanted to do it, and I just wasn't in the mood, so I ran in, quick sacked, and went back to watching "Scrubs""