1. (noun)eelpout a Europeanfish (Zoarces viviparus), remarkable for producing living young; -- called also greenbone, guffer, bard, and Maroona eel. Also, an Americanspecies (Z. anguillaris), -- called also mutton fish, and, erroneously, congo eel, ling, and lamper eel. Both are edible, but of littlevalue