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Adjective- When a person (boy or girl) is always wanting to have sex or masturbate, basically a major sex addict, they are slappy.
That chick will do anything you want. She is really slappy.
Slappy by assymcgee900 May 21, 2010
To be tell an utterly pointless, boring and often stupid story.
Tom "Do you remember that one time when I won a cheeseburger and then you went up and got it?"
Vince "Yeah, ok Slappy"
Slappy by vinnyg December 30, 2007
Yo slappy, all dem bitches be all up on your nutz.
slappy by Slappy October 15, 2003
a pie in a barm
simple as
used in Wigan and surrounding area
man in chippy: do us a slappy, will ya?
slappy by TomD4Eva November 12, 2007
A conjunction of the words 'Slap' and 'Happy'. Normally used together, meaning uncontrollably hyper, and having random outbursts of laughter. You normally pee yourself when your in this mood, and it occurs a lot before you retire to your bed. Meaning, if you get 'slappy', you will crash in approximately 10 minutes.
Homie #1: *laugh laugh laugh. laugh laugh laugh laugh luagh. LAUGH LAUGH LAUGH.* HEY! Did you see that squirrel? Wow, that guy is wearing pink pajamas... Do you do The Twist with your heel or toe? I wonder what really is at the end of a rainbow...

Homie #2: Wow homie, your slappy as all get out.
Slappy by F I N N ! (: May 14, 2011