Collins Russian Dictionary 2nd Edition © HarperCollins Publishers 2000, 1997:
dally [ˈdælɪ] vi болта́ться (impf) без де́ла
to dally with (idea, plan) носи́ться*(impf) с +instr
* is used to mark translations which have irregular inflections. The Russian-English side of the dictionary gives inflectional information.