upper middle class
Refers to the socioeconomic class between middle and upper class, often used in discussions of income, lifestyle, or marketing demographics.
彼はアッパーミドルの家庭で育った。
He grew up in an upper-middle-class family.
Variant with a middle dot; less common but still seen.
Loanword from English 'upper middle', likely a clipping of 'upper middle class'.