(formerly) a person or ship illegally engaged in the slave trade, especially in the Pacific.
Origin of blackbirder
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
Examples from the Web for blackbirder
Historical Examples of blackbirder
They say he used to be a pirate and blackbirder and that he can tell strange yarns if he will—but that's all talk.The Pirate Shark
The authorities, they get worried because a Kanaka's spree lands him, like as not, in a blackbirder.