thickshake noun2 •(Australia, New-Zealand) A beverage consisting of milk and ice cream mixed together, often with other flavorings as well.All Johnny really had on his schedule was a plan to order a thickshake, which to him represented the ultimate American experience. — 2013 •An imitation milkshake (in locales where "milkshake" refers to the drink specified above), often containing no milk.Pawpaw contains an enzyme papain which breaks down protein and is said to help clear mucus and excess saliva excretions. Give this thickshake a try; it is really easy to swallow and tastes wonderful. — 1993 formsthickshakes