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1: A fool; and idiot; someone who is crazy

2: A type of baseball pitch
1: Man, he's a nice guy but he's such a screwball sometimes.

2: Woah, did you see that screwball?!
by zeemeister April 23, 2011
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4
A 50/50 mix of Powder Heroin and Powder Cocaine. Creates the feeling of being in a relaxing warm bathtub mixed with the desire to complete an insurmountable task. This volatile mix is usually mixed into a drink because snorting it is too risky.
Guy 1: "I heard that guy over there is selling "screwball"."
Guy 2: "That stuff will mess you up for days."
by Big Poppi July 28, 2014
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5
Based off of the ice cream. You work so hard for that chewing gum at the bottom and, after all your hard work, it tastes like shit
Substitute this into life and relations and you get a fairly philosophical meaning to an 89p ice cream.

When you work hard to get a date and eventually, you realise you hate it.
Pritesh - Ugh, I just spent 2 months reaching for this Lauren girl and she's so clingy and depressing.

Josh - Dude, you totally just screwballed.
by Better Than Arcan February 02, 2015
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6
A pony loving faggot who sucks huge and massive dick. He is an asshole and his first name usually starts with an N. His friends all hate him, and they normally refer to him as a pony faggot, as well as spam him over the internet. He likes to eat chips with his mouth open because he is a fatass. He has no brothers or sisters because he was adopted by 2 gay Russian supermodels. His vagina smells like horse because he is only fucked by ponies. In fact, that is the only type of porn he likes.
Screwball: I LIKE TO START PUNCHING BABIES IN THE FUCKING FACE WHEN PEOPLE START THROWING PONIES ALL OVER THE FUCKING PLACE, BECAUSE I LOVE PONIES. BRONY FOR LIFE.

Normal Person: Shut up you ponyfucker, nobody likes you.

Screwball: I LIKE TO EAT CHIPS VERY LOUDLY OVER TEH MICROPHONE. THEY ARE YUMMY BUT NOT AS GOOD AS PONY DICK.
by SCREWBALL IS PONY FAGGOT September 21, 2013
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7
A pretentious fuck who just wants to bang every girl that hey can. Wears vinyard vines and designer collard shirts and shorts paid for by daddies money, oh yeah he probably drives a BMW or Volkswagen Golf.
Bryce tried to fuck Jessica and Tiffany at the party, what a screwball
by Wordplayer44 May 14, 2016
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