sandwich class

Etymology
Originated in the 1980s, from the perception of being "sandwiched" (or "squeezed") between the lower and upper classes.

Noun

 * 1)  The middle class; specifically those who are too wealthy to qualify for welfare schemes but not rich enough to afford non-subsidized housing, access further opportunities or maintain lifestyle expectations.

Translations

 * Chinese:
 * Cantonese: 夾心階層