lunker

[ luhng-ker ]
/ ˈlʌŋ kər /

noun

something unusually large for its kind.
Angling. a very large game fish, especially a bass.

Origin of lunker

1910–15; lunk- (see lunkhead) + -er1
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019