An omnivore who excludes poultry, beef, and pork from their diet but includes fish (and usually other forms of seafood like shrimp, oysters, scallops, etc.).<br />Because these people do choose to include meat in their diet (seafood is muscle tissue from a live animal and therefore meat), they are not vegetarian as vegetarians do not consume meat.<br /><br /><br />pescetarian definition by Urban Dictionary