what the heck
What the heck (interjection) means an exclamation of surprise, confusion or annoyance at something unexpected. Example: “What the heck was that noise?”
How to use what the heck
Learner’s notesIn plain EnglishA polite way of saying 'what the hell'.
Informal, mild, chiefly American but widely understood.
Heck also intensifies on its own: 'a heck of a lot' simply means a great deal.
Trace the full origin ↓Fill the gap
Can you complete this real example?
_____ was that noise?
Etymology
From heck, a euphemistic alteration of hell used to avoid swearing.