I don't seem to know the other games people are mentioning, so not sure how fitting this is, but Nefarious. I've introduced multiple people to the game and it never takes long. The core rules are simple, turns are simultaneous and quick, the games are short.

The actions you can take are simple enough that the cards in your hand include the details (with the caveat that I know the polish localized version).

The twist is, well... The twists. Every game you draw and reveal two twist cards that change the game rules, keeping things interesting.

As a bonus, I like the simultaneous turns. The actions you can take are represented by cards, and at the start of the turn everybody places an action card face down, and they are revealed simultaneously. No turn order, less waiting, more action, and a nice element of intrigue of trying to predict what the other players will play on a given turn.