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Expression of the state of being extremely excellent. Equivilent to "totally cool", "deadly" and "sweet". Originated (possibly) in West/Inner Dublin City, Republic Of Ireland.
"Dat was bleedin rapid"
by Weakboy March 12, 2005
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When a female becomes sexually aroused and creates enough natural lubrication that it's like the Rapids Water Park.
Me: Dude, I went to the rapids last night!

Friend: Nice!!
by everybodylovesross October 18, 2010
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Used to describe an action that occurred fast, was unexpected and was great.
Person 1: That was so fast and fantastic. I did not expect that!

Person 2: Yeah, it was pretty rapid.
by Sir.Meowington January 31, 2016
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An Irish scumbag term for something that is greatly fantastic or wonderful.
Jasis Anto, did yis see Cairnsy's new moped?

Yeah man, it was fookin rapid
by Fiachra Davison December 18, 2004
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