Mouse party 

A celebration by subordinates on the occasion of their supervisor's absence. Usually applied to office workers, but relevant to any mischievous celebration orchestrated by peers answerable to a common individual.

Borrowing from the phrase 'when the cat's away, the mice will play', a mouse party might be celebrated by a team of employees taking a two-and-a-half-hour lunch together, or sneaking out of the office an hour early to drink at a bar.

Frank's going to be "working from home" tomorrow -- who's planning the mouse party?

Mouse party by Luxcrete August 19, 2011

Bull Moose Party 

The most successful third party in American History. It was headed by Tedd Roosevelt fresh of his African Safari and was completely based of his candidacy of the 1912 Presidental election. The whole purpose was to get rid of President Taft after TR realized that he sucked as a president. Bull Moose split the Republican vote and allowed Dem. Woodrow Wilson to win the election. The Party died with TR in 1919.

More states voted Bull Moose than voted Republican.

Bull Moose Party by Ron_Thornbrash July 15, 2008

Canadian Moose party 

The act of covering ones penis in maple syrup, buying a moose, and having the moose lick it off while enticing it with a carrot in its asshole.

I went on vacation this weekend and had a Canadian moose party

Canadian Moose party by Thundercuntblaster October 25, 2016

Party Moose 

A term used to define your friend, when he or she is acting outrageous. Used in many situations, you can also refer to them as idiots.

Charlene stop being a PARTY MOOSE!!!

Party Moose by Turtle20 October 29, 2010