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.
Lightly season lean meats using herbs such as rosemary, sage and thyme to make them delicious and to keep the fat and carb content low. If it is within your budget, choose lean cuts that are free-range, organic or grass-fed, since most commercial cuts contain antibiotics and hormones.