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 in the summer.
Once spring ended I got a summer hummer.
by Magictown September 1, 2018
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A person who relishes the summer months.
I think summer is even better than spring break. I guess I'm a major summer hummer.
by Ereck Flowers November 21, 2018
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