Casino games are prohibited in Brazil. Poker, either land-based or online, is unregulated in Brazil as it is considered a game of skill and, therefore, falls outside of the scope of Decree-Law No. 3,688/1941 (the Misdemeanour Criminal Act of 1941  MCA).
Gambling is not a legal concept in accordance with Brazilian law. In fact, gambling doesn't even have a perfect translation in Portuguese. We can say that it can mean a bet or a game, involving a consideration, a prize and a chance.