OMG - as the French might say! (3,4)
I believe the answer is:
mon dieu
I'm afraid I can't even guess how this answer relates to the clue.
Can you help me to learn more?
(Other definitions for mon dieu that I've seen before include "Quelle surprise" , "Stereotypical French exclamation" .)
I've seen this clue in The Irish Times.
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