Graças a deus is Portuguese for thank God, while mlk is Brazilian internet slang shortened from moleque, a casual word for a young guy or mate. The original recording behind this short clip is not widely documented, so it is best understood as a piece of Brazilian online slang rather than a line from a known film or show. Short reaction phrases like this spread through memes, short videos and chat audio, where a familiar expression can carry a whole joke in under two seconds. Its staying power comes from everyday relief, luck and narrow escapes.