The story
Likely borrowed from a Slavic language, e.g. Russian америка́нский (amerikánskij). Equivalent to American + -sky.
Etymology from Wiktionary, CC BY-SA 4.0.
Americansky
Today it means: Yank, Yankee (stereotypical Slavic term of abuse for a U.S. American, e.g. used by or attributed to Soviets). Full definition →