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3.
An English expression when one is great rivited or surpised.
Great scott! Cried the english man as he walked into the room.
by Iggy128 June 28, 2004
 
1.
A phrase one uses to show surprise or disbelief. Made famous by Doc Brown in the Back to the Future movies.
"Great Scott!" Doc yelled as he dropped a microwave on his toe.
by Honor Man May 03, 2005
 
2.
Used by crazy, wild-eyed scientists who are into time traveling and hanging out with high school boys.
Great Scott, Back to the Future is awesome, but why does such an old dude hang out with a high school kid.
by ThE LaTe JC March 22, 2005