Ninja Sex Party (often shortened to NSP) is an American musical comedy duo consisting of singer Dan Avidan and keyboardist Brian Wecht, created in 2009 in New York City and currently based in Los Angeles. They are also known as two thirds of the video game-based parody musical trio Starbomb together with frequent collaborator Arin Hanson, and as a part of the YouTube Let’s Play webseries Game Grumps, also with Hanson.

The work of Ninja Sex Party typically consists of synthpop or rock-oriented humorous songs