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Whopper

//ˈwɒp.ə(ɹ)// noun, slang

Noun

1
Something remarkably large. informal
"I’d gone out pike fishing, bless you, never thinking of a trout, and when I saw that whopper on the end of my line, blest if it didn’t quite take me aback. Well, you see, he weighed twenty-six pound."
2
something especially big or impressive of its kind wordnet
3
An outrageous or blatant lie. informal
"When he got done telling it there was one of them uncomfortable silences that comes, you know, when a person has been telling a whopper and you feel sorry for him and wish you could think of some way to change the subject and let him down easy, […]"
4
a gross untruth; a blatant lie wordnet

From whop + -er.

Unscramble this word: whopper