noun
man used for free rides; designated driver (slang)
Dated slang from the bubble era; refers to a man who is kept around mainly to drive a woman around for free. Often used in the context of dating or social circles where the man's car is the main attraction.
See also: 足 (あし)
彼女はアッシー君を何人もキープしているらしい。
She apparently keeps several guys around just for free rides.
バブル時代にはアッシー君という言葉が流行った。
The term アッシー君 was popular during the bubble era.