소맥 [ somaek ]
소 in 소맥 is for 소주 (soju) and 맥 is for 맥주 [ maekju ] (beer). If beer is mixed with soju, it is 소맥. It is very easy to make and the ratio varies; the stronger you want, the more soju you need. Some say the golden ratio is 30 : 70 (soju : beer) and Korean beer is usually better for 소맥, though.
You may have heard 소콜 [ sokol ], which is soju and cola, or 소사 [ sosa ], which is soju and cider.
In similar ways, there are 치맥 [ chimaek ] (Korean style chicken and beer) and 피맥 [ pimaek ] (pizza and beer).
A) 아 오늘 덥다! 치맥 어때? (Ah, it’s very hot today! How about chimaek?) B) 좋아! (Sounds great!)
A) 너 소맥 좋아하니? (Do you like somaek?) B) 별로. 난 소사가 좋아. (Not really. I like sosa.)