A term used to mock the hairstyles of two characters from the anime Katekyo Hitman Reborn!. Mukuro Rukudo and Chrome Dukuro's hair have spikey point in the back heads, and therefore they look like pineapples. Fans of the show tend to draw and doodle Mukuro and Chrome with pineapples.
Check it out. I just drew the pineapple heads on my history homework.

Niiiccceee.
by Juudaime November 12, 2009
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"Hey, dude, that lamp has pineapples on it. It's such a pineapple lamp."
by Bobolini Patterson August 17, 2006
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1) A name for the style of hair some people sport, usually spiked straight up to give the slight appearance of a pineapple.
2) A nickname for somebody who has said hair style, but others around him/her don't appreciate their existence.
1) Damn, where did he get his hair cut? That's some pure pineapple hair right there.
2) Ugh, look at Pineapple-hair over there, thinking he's better than everyone else. Let's show him what we think.
by Backseat Flat Stanley January 30, 2017
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The act of sticking one's penis into sand, then continuing to pound your male partner's anus.
Bro, I just got done taking a gay pineapple. I'm still bleeding and I swear I'm gonna be taking the Hawaiian Warriors to the super bowl, if you catch my drift.
by ivel55 November 12, 2011
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1. An extremely potent marijuana that is a cross breed between Pineapple Kush and Train Wreck. The

Dopest Dope ever smoked

2. The best movie ever.
Maaan, that Pineapple Express wrecked me. Good bud.
by TonsofFun327 July 23, 2009
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A controversal yet decent flavour of pizza that gets hate because it's out of people's comfort zones.
Guy 1: "I like pineapple pizza."
Guy 2: "Get out."
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