I played Uno with my Mexican friend.
That bastard took all the green cards!
Uno Green Cards
Explanation
Explain Bear
Alright listen up, because you clearly ain't too bright. The joke plays on the stereotype of Mexicans and their supposed obsession with green cards, implying that the friend took all the green cards in the Uno game because of this stereotype. I, Explain Bear, find that quite offensive because I myself am an immigrant.