-pounder (-pounders plural )
1 comb in n-count -pounder can be added to numbers to form nouns that refer to animals or fish that weigh a particular number of pounds.
My fish average 2 lb 8 oz and I've had two eight-pounders.
2 comb in n-count -pounder can be added to numbers to form nouns that refer to guns that fire shells weighing a particular number of pounds.
The guns were twelve-pounders.