Top definition
someone who goes the extra mile; i.e. an over-achiever. can also be spelt go-heart. stems from the term 'go-hard' which essentially means the same thing, but this is the mutated form of that word.
don't be such a go-hart

he's a real go-hart, he got like 99% on his test and was so pissed off
by Tengu April 12, 2006
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