subprime

Short definition from Wiktionary

Adjective

1. 1
   Less than prime; inferior.
2. 2
   Designating a loan (typically at a greater than usual rate of interest) offered to a borrower who is not qualified for other loans (for example, because of a poor credit history).
3. 3
   Designating a type of commercial lending rate, less than the prime rate, offered to desirable borrowers.

Noun

1. 1
   A subprime loan.