趴 [pā] n. Party. The word literally means lying on one’s stomach, but as an Internet slang term, it means “party” because of the similar pronunciation.
聖誕趴 [shèng dàn pā] n. Christmas party.
轟趴 [hōng pā] n. Bomb+lie on one’s stomach. Home party. This Internet slang term is a translation of the English term “home party” because 轟 [hōng] sounds like “home” and 趴 [pā] sounds like “party.”