Collins Russian Dictionary 2nd Edition © HarperCollins Publishers 2000, 1997:
bashing [ˈbæʃɪŋ] n (inf)
union-bashing я́ростные напа́дки на профсою́зы
* is used to mark translations which have irregular inflections. The Russian-English side of the dictionary gives inflectional information.
bash [bæʃ]
vt (inf)колоти́ть*(поколоти́ть*perf)
n
I'll have a bash (at it)(BRIT) я попыта́юсь
bash up vt (car) разбива́ть (разби́ть*perf) (BRIT) (person) избива́ть (изби́ть*perf)
* is used to mark translations which have irregular inflections. The Russian-English side of the dictionary gives inflectional information.