Méitǐ cháng bǎ Měiguó zhèngfǔ chēng wéi ShānmǔDàshū.
The media often refers to the US government as Uncle Sam.
Tips
history
Uncle Sam dates to the War of 1812: Samuel 'Uncle Sam' Wilson supplied beef to US troops stamped 'U.S.,' which soldiers jokingly read as 'Uncle Sam.' James Montgomery Flagg's 1917 'I Want YOU' poster fixed his iconic look — top hat, white beard, red-white-and-blue suit.
memory
山姆 (Shānmǔ) is the standard transliteration of 'Sam'; 大叔 ('uncle') translates the kinship part. The same 山姆 appears in 山姆会员店 — Sam's Club, Walmart's membership chain.