This is the 7272nd most frequent Chinese word.
美式
"美式" means "American style."
In this sentence, "美式" refers specifically to the style of coffee preparation associated with Americano coffee.
我喜欢喝美式咖啡。
I like drinking Americano coffee.
Here, "美式" describes characteristics typically attributed to something American, in this case referring to a style of playing (e.g., a sport).
他的打法很美式,非常注重力量和速度。
His playing style is very American, emphasizing strength and speed.
"美式" in this context characterizes the burger's style as American, suggesting a particular preparation or topping convention.