Larger than normal dog testicles. Normally bright pink and found between the dogs butt-hole and dick.
"My dog Mickey has a nice set of lunkers."
by Ricky McCabe II June 1, 2007
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Slang for large heavy penis.
Man, my back hurts from carring this Salty Lunker around everywhere
by tsukisan December 18, 2012
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To take a big crap and not flush the toilet.
Don't invite E. pettit over, he often will leave a lunker in the fish bowl!
by kolman March 20, 2008
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