JIGGER Meaning of JIGGER in English jig ‧ ger /ˈdʒɪɡə $ -ər/ BrE AmE noun [countable] a unit for measuring alcohol, equal to one and a half ↑ ounce s , or the small glass this is measured with Longman Dictionary of Contemporary English. Longman - Словарь современного английского языка. 2012