a drunken discussion between 2 or more people about a subject that makes perfect sense at the time. Adapted from the word "pissed" which means drunk/wasted.
When a man tally-whacks an individual across the head and/or face with his penis and causes either permanent or temporary memory loss, impaired speech, headache, dizziness; may result in moderate loss of motor skills.
Term is mainly used in forums and instant messaging, to show the source's opinion that what he has just said is the be all/end all truth, he has spoken, and that all further discussion might as well stop.
It can also be spelt /discussion.
It's an awful movie and anyone who thinks otherwise should die a slow, painful death.
Jim and Felicia were talking about plans for the weekend, he thought is was just a discussion about what would be fun to do, she thought it was an argument about whether to go to the Ween show or not. So they had a discussionment.