a drink to follow immediately after another drink
"After finishing his whiskey, he ordered a neat Coke as a chaser to cut the burn."
A person or thing (ship, plane, car, etc.) that chases.
"The antique silverware set featured delicate floral patterns created by the master chaser before it was sent to the shop for polishing."
Someone who chases (decorates) metal; a person who decorates metal by engraving or embossing.