lunker

lunk·er

 (lŭng′kər)
n. Informal
Something, especially a game fish, that is large for its kind.

[Origin unknown.]
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

lunker

(ˈlʌŋkə)
n
(Fishing) slang US an exceptionally large fish
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014

lun•ker

(ˈlʌŋ kər)

n.
something unusually large for its kind, esp. a large game fish.
[1910–15; lunk- (see lunkhead) + -er1]
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
References in periodicals archive ?
Bowers earned the Lunker Award with his 3.92-pound catch.
Now a resident of DeLand, FL, Parent fishes from a Feel Free Lure 10 kayak, from which he caught an 8-pound, 3-ounce lunker on Halpatiokee Lake last April, a tagged fish he registered with Trophy Catch.
That being said, he wouldn't reveal where he caught his lunker of a largemouth.
Then, you might have come to view the lunker Kokanee salmon and brown trout that migrate up the Deschutes River from the Wickiup Reservoir in September, or the bald eagles and osprey that are enticed by the spawning fish.
Q: OK, what is the tougher challenge, catching a lunker largemouth or arrowing a Pope and Young buck?
If you are lucky, you might find a lunker as Adam Johnson did in Alberta's match.
Glen Appleby from Peterlee landed a lunker of 20lb 4oz on a drifted buzzer and part of a 15-fish catch.
I use them just as often for walleyes, which love their profile and action, especially if independent shad-bodied baits like the Lunker City Shaker or the YUM G-Shad are fished flat on a jighead instead of rigged up and down in natural fashion.
Maybe he can't let go of his pole just yet because he's too busy waiting to land his lunker. Nah, that's unlikely, the fish still don't seem to be biting.
When I first visited Shadwell in the summer of 2002, he was emailing his Monday morning messages to the White House with an alluring offer: free lodging at Point of View Resort and a guided fishing trip for lunker walleyes.