Also, crumby. Slang .

dirty and run-down; shabby; seedy

a crummy fleabag of a hotel.

of little or no value; cheap; worthless

crummy furniture that falls apart after a month of use.

wretchedly inadequate; miserable; lousy

They pay crummy salaries.

Railroads Slang . a caboose.

adjective

cheap , contemptible , crappy * , grotty , inferior , miserable , pathetic , poor , rotten , second-rate , shabby , sub-par , third-rate , useless , worthless , base , lousy , paltry , sleazy , trashy