To have sex with a fat girl. Sometimes they are sweaty but always have blubber and a blow hole. Fat girls are just so grateful.
Jesus, did Nik harpoon the whale last night. She was so fat after he shot his bolt he had to roll over twice to get off her.
by The Strut October 12, 2004
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The act of going out to the bar or nightclub and finding the biggest, fattest, ugliest girl possible; then taking her back to your place and having sex with her.

Usually done by groups of men as a form of competition to see who can get the biggest girl. As proof, the curtains in the persons bedroom/hotel room are usually cracked so others can look in. If you're ballsy and shameless, you throw the curtains wide open.
Rick definitely won at Harpooning a Whale. That girl looked like an upside down mushroom from a block away.
by Shameless Shane June 18, 2011
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A call used in derogatory fashion to make a fat girl's presence known so everyone around can enjoy laughing and staring.

Literally, it means "Fuck that fat chick!"
by cerealkiller182 October 31, 2005
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Fisting with an amputee's stump. See also The Caption Ahab.
He took the prosthetic of his stump and then began Harpooning the White Whale!
by Moby_Dicktator November 20, 2010
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When a woman masturbates or when a man fingers a woman
Woman 1: I was harpooning the whale as hard as I could last night
Woman 2: I know I heard u
by ass in your face May 19, 2018
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to pick up a fat chick, oftentimes in the service of your mate getting with her attractive friend. See also grenade.
Jay had to harpoon the whale at the caravanning party so his mate Simon could pull the fit bird.
by HolyFlurkingSchnit November 19, 2015
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