おやびん

Etymology
Alternation of.

Noun

 * 1)  boss, chief

Proper noun

 * , American president

Usage notes
The use of おやびん (Oyabin) as a nickname for then-US President Donald Trump may have originated as a sly criticism of then-Japanese Prime Minister, suggesting that the US leader was the “boss” of the Japanese one. The usage was adopted by some supporters of Mr. Trump, as someone who would look after and take care of his followers.