Top Definition
The act of receiving oral sex; Commonly known as brain, as in "getting brain," heenan is derived from WWF superstar manager Bobby "The Brain" Heenan. To get heenan is to receive oral sex. Therefore, when someone is receiving brain they are receiving heenan. Also known as head, dome, and skull.
This fine cutie pie gave me the illest heenan last night. I think I'm in love.
by Cobra Kai May 26, 2005
Arabic Name meaning fragerance also anglicized form of Gaelic Ó hÉanáin. Also is a name of a girl. Heenan is loving/caring friend who is extremely talkative, and has a good sense of humour. She is funny and gives great advice! She is also beautiful and her personality shines brighter than any girl in the room. Her smile is extremely contagious, she loves to make people laugh and smile.
"Heenan gave me the best advice yesterday"
"I'm so happy to have Heenan in my life"

"Hey that girl is a total Heenan"
by XoParadiseXo June 02, 2015

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