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1.
To indulge in too many alcoholic beverages to the point you can't control your actions. Overspeed is when the most amount of alcohol your body can handle safely is overstepped.
I went out for a few beers with mates and I oversped to the point I don't know how I got home. An engine overspeeds when it goes faster (harder) than its capable of. smasheddestroyedruineddrunk as bro
by 2Bit February 12, 2013
 
2.
speeding over 120 mph or 180 kmh
when learning how to drive kids are told not to speed but in the case of jeff gordon he was told not to overspeed.
by Kunerd August 22, 2007