Help me identify this card game with secret, changing rules
Sounds a lot like Mao (which I was introduced to as Chairmen).

It's a card-shedding game (i.e. like Uno) with secret rules that can vary by playing group. As the game goes on, more rules are added but not directly explained. The game typically goes on until everyone gives up.

EDIT:
Some sample starting rules might include these ones that are fairly common when I've played it:


Ace skips the next player's turn
Jack reverses the play order
8 allows anyone to play a card of the same suit immediately. Play continues from that person onwards.
Spades must be named out loud
7 must be followed by saying "That's the badger" (after saying "7 of spades" if appropriate)
Kings and Queens must be saluted
You must say "last card" when you have one card remaining
You must say "Mao" when you go out ("Taking the Chairman's name in vain" at any other time faces a hefty three-card penalty)