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To pump a Texas Mickey of whiskey directly into one's mouth.
Honestly I harooned before we went for lunch drinks, it felt great and I feel no shame in harooning.

One time Haroon harooned and then harooning became a thing
by SousedBergin December 22, 2017
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2
Performing feats of amazing spazzmatics.
"Wow, did you see that spazz make a fool of himself? Thats some first class harooning."
by jubal the jube June 25, 2017
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