Top Definition
term used to describe one's mood when sleep deprived or tired. Signs of being 'slap happy' include inane rambling, strange remarks, odd random behavior (such as giving oneself a wedgie), uncontrollable laughter at one's own jokes.
Bob is slap happy today because he was out late last night.
by ladeefalcn March 31, 2005

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when you are extremely tired (like if you stay up 'till 1 or 2 in the morning) and everything makes you laugh
molly says "OMG!!! THERES A ZIT ON MY NOSE!!! AHH IM GUNA DIE!!!" David starts laughing histerically at that statement. David is "Slap Happy"
by CraZy aZN dUDe July 14, 2005

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due to extreme tiredness one becomes giddy with uncontrollable laughter, also described as naturally high
Jenkins:"Hey Bob! guess what?"
Bob: "What?"
Jenkins:"Fruit Loops!"
Bob:ahahahahahahaha!*laughs uncontrollably*
Jenkins:"Dude you're so slaphappy"
by sami and syd July 01, 2006

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The state of being one may experience after abstaining from sleep for a long period of time. Could be described as being so sleepy that you feel hyper and alert.
It's 3 PM, I didn't go to bed last night, but I don't feel sleepy! I must be slap happy.
by put it on December 23, 2009

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adj. (1) this word describes the state of someone who becomes somewhat giddy or abnormal in behavior as a result of being smacked around. It is thus synonymous with punch drunk.
(2) it has also been used to describe a person with a penchant or delight in hitting others, but this is certainly not a noun that refers to the state of happiness produced by the hitting.
You can tell that boxer was slap-happy in his post-fight interview.
That bitch, Jennifer, she sure is slap-happy. But I guess it's usually good when a girl hits you.
by chagrin94 September 15, 2005

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to gain massive excitement from slapping people.
jason was getting a bit too slap-happy with jeanette last night
by Phalkon October 31, 2004

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When someone's been in a fight and they've been hit in the head so much that it makes them act silly and crazy. Sort of like punch drunk.
After getting the crap beat out of him, he got so slap happy that he couldn't stop giggling, and he didn't know what was going on.
by SpecialKRJ March 01, 2010

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