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Flag+wagon=flagon. Any large American made vehicle festooned with multiple US flags or other patriotica.
Mom drove us to the movies in the flagon, how embarassing.
by Taco Flavored Keeses June 23, 2004
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
Irish: a 2 litre bottle of cider
ah sean could go in and get us 3 flagons
by seanibalfe September 24, 2008