Collins Russian Dictionary 2nd Edition © HarperCollins Publishers 2000, 1997:
junket [ˈdʒʌŋkɪt] n (CULIN) сла́дкое моло́чное блю́до; (US) (inf: pej)
to go on a junketпрокати́ться*(perf) за казённый счёт
* is used to mark translations which have irregular inflections. The Russian-English side of the dictionary gives inflectional information.