According to the search results, "hummer" is a slang term that can refer to different things:

• Oral sex technique: A "hummer" is an oral sex technique where the person performing the act hums, creating vibrations with their lips, while going down on a man.

• One who hums: "Hummer" can also refer to someone who hums.

• Vehicle: "Hummer" can be used to refer to a type of vehicle resembling a jeep but bulkier, also known as a Humvee.

• Joke: "The Hummer" is a term used as a joke for oral sex.

It is important to note that the term "hummer" is slang and may not be appropriate in all contexts.