Collins Russian Dictionary 2nd Edition © HarperCollins Publishers 2000, 1997:
stinker [ˈstɪŋkər] (inf) n (person) мерза́вец*-вка#]
it's a real stinker of a problem/exam э́то жу́ткая пробле́ма/ужа́сный экза́мен
* is used to mark translations which have irregular inflections. The Russian-English side of the dictionary gives inflectional information.