A gyre is another name for a swirling vortex. Ocean gyres are large swirling bodies of water that are often on the scale of a whole ocean basin or 1000 s of kilometers across (hundreds to thousands of miles across).
Lean meats are meats with a relatively low fat content. Skinless chicken and turkey and red meat, such as pork chops, with the fat trimmed off are examples of lean meat.
1 Extra lean meat contains less than 5 grams of total fat and less than 2 grams of saturated fat.  Lean meat contains less than 10 grams of total fat and less than 4.5 grams of saturated fat.