To eat very quickly.
To draw air or any form of gas (either in a pure form, or mixed with small particles in form of aerosols/smoke -sometimes stemming from a medicament) into the lungs, through the nose or mouth by action of the diaphragm.
To draw air into the lungs, through the nose or mouth by action of the diaphragm.
An inhalation.
To finish completely, especially a food (polish the plate with one's tongue) or liquor.
To remove by polishing (rubbing with a fine abrasive).