Having doggy style sex with a fat girl. Upon ejaculation, the male shall be referred to as Captain Ahab, and whichever one tells the story with more dignity shall be called Ishmael.
Greg: Dude I heard you banged a fat girl last night
Craig: Yeah dude, not one of my better nights
Greg: What position were y'all in
Craig: Doggy
Greg: Dude you have to stop doing the humpback whale
Craig: I also finished
Greg: Way to go Captain Ahab. Let me know if you see Ishmael again.
by Phil Bob February 17, 2014
When two people are farting back and forth, where it almost sounds like two humpback whale’s singing to each other.
Hey Bro, Jason and I went to a chili cook off yesterday and we were humpback whale’n all the way back home.
by indysolo August 14, 2014
a gay whale
a homosexual whale
a sir mix-alot whale
a whale who's keepin it on the 'down low'
a whale that humps 'back' as opposed to one that humps 'front' - etc
person 1: "Oh man dem whales are faggots".
person 2: "yeah,them's some humpback whales".
person 3: "yeah them whales hump ass"
person 4: "damn homos"
by ~tilde man~ September 08, 2005

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