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The opposite of being street-smart.

Thinks talking about doing drugs makes them cooler, when they actually have barely done any.

Very loudmouthed about illegal activities or not experienced in the ways of chilling.

Excessive party fouls could be a sign of one.
Josh, only ever talking about drugs in math, is a street-tard.
by DreadedPanda13 May 14, 2011
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May 12 Word of the Day
When someone goes to the gym and spends 90% of the time on their phones scrolling through social media
Looks like its thumb day again for Jimmy with his usual routing... 3 sets of 5 snapchat selfies and 10 sets of scrolling through facebook until exhaustion
by Gary br April 02, 2017
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