Definition of heck exclamation from the Oxford Advanced American Dictionary

 

heck

 exclamation,noun
exclamation, noun
NAmE//hɛk//
 
(informal)
 
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  • used to show that you are slightly annoyed or surprised Oh heck, I'm going to be late! Heck! You're here early! We had to wait a heck of a long time! Who the heck are you?
  • Idioms
    for the heck of it(informal)
     
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    just for pleasure rather than for a reason
    what the heck!(informal)
     
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    used to say that you are going to do something that you know you should not do It means I'll be late for work but what the heck!
    See the Oxford Advanced Learner's Dictionary entry: heck