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1.
Running around like a freakin' maniac, trying to get a lot of stuff done.
Man, I was so ready for vacation that I was tearassing around my office today, just trying to get everything done so I could leave early.
by idiotgrrl July 09, 2010
 
2.
To move quickly about.
The man hopped in the '57 Chevy and went tear-assing through the otherwise quiet city streets.
by Fascion August 01, 2009