australian, n; a large bottle ( 2L to 4L ) of wine, usually cheap.
Aww mate, you had 3 flagons last night? Can it really be done?
by herbie August 25, 2004
Can you define these popular missing words?
Irish: a 2 litre bottle of cider
ah sean could go in and get us 3 flagons
by seanibalfe September 24, 2008