low-class 
adjective
Of a low or inferior standard, quality, or social class: low-class places of amusement...
- But you just can't get into the middle class today with a low-class education.
- The conventional Vietnamese wisdom was that certain foods were low-class, common food, even though these foods were nutritious.
- To some, the music is rude, low-class, and blatantly sexual and so could not possibly play any part in improving anyone's life.
- undersea
- underseal
- undersecretary
- undersell
- under separate cover
- underserved
- underset
- undersexed
- undersheriff
- undershirt
- undershoot
- undershorts
- undershot
- undershrub
- underside
- under siege
- undersigned
- undersize
- undersized
- underskirt
- underslung
- undersoil
- undersold
- under someone's nose
- under someone's spell