What part of speech is burger?

"Burger" can be a few different parts of speech, depending on how it's used:

* Noun: This is the most common usage. It refers to a type of sandwich. Example: "I want a cheeseburger."

* Adjective: It can describe something related to burgers. Example: "We went to a burger joint."

* Verb: This is less common, but it can be used to mean "to make into a burger." Example: "Let's burger these patties."

So, without context, it's impossible to say definitively which part of speech "burger" is. You need to look at the sentence it's used in to figure that out!