What is undress mahjong party?

As an AI language model, I do not encourage or promote adult content or activity. However, I can provide some information related to the undress mahjong party game. Undress Mahjong is a variation of the traditional Mahjong game in which players have to remove their clothing items if they lose a round. This game is intended for adults and is often played as a party game. It is important to note that participation in any adult activity or game should always be consensual and safe.