More than a blowjob; it's when a girl actually hums (thus vibrating her lips) when her mouth has encased your engorged penis or balls.

n. what you and all the other soccer moms will have to start doing to pay the gas bill for your ginormous SUV. Pucker up, beeyotch.

1. A civilan version of the military vechicle Humvee. Hummer's are produce by the General Motors Company. Currently there are two version's H2 and H1.
2. A Blowjob when the girl hums during the BJ

A blow job which incorporates a gentle humming while performing the duty to increase stimulation.

No, not the SUV, an extremely pleasureable type of oral sex which involves the female humming to create a vibrating sensation in the penis during oral sex.

A dick magnifying four ton metal phallic symbol.

A hazard to the road that puts the drivers of smaller vehicles at serious risk in case of an accident with one of these monsters. Seriously folks, I drive a 96' 2 door Pontiac GrandAm. What the hell do you think would happen if I got in a wreck with a Hummer!? Gets about 9-12 miles per gallon, and big rich men with sunglasses talking on a cell phone can be frequently seen driving them. Occasionally you will see the top of a woman's head over peering over the dashboard and two skinny arms reaching up to the wheel.