アメション

noun

person who has spent just a short time in the US; someone who went to pee in America (lit.)

Obsolete humorous slang from the early Showa period, blending アメリカ (America) and しょんべん (pee). Used to mock people who boasted about a brief stay in the US, implying they only went there to urinate.

See also: 小便 (しょんべん)

• 戦せん前ぜん、「アメション」という言こと葉ばが、短たん期きのアメリカ滞たい在ざいを自じ慢まんする人ひとをからかうのに使つかわれた。

  Before the war, the word 'ameshon' was used to tease people who bragged about a short stay in America.

• 「あいつはアメションだ」と陰かげで言いわれていたらしい。

  It seems they were called 'ameshon' behind their back.