The kanji 脇 (waki) can mean “back burner” in the metaphorical sense:
その話は脇に置いておいて 。。。
Sono hanashi wa waki ni oite oite …
Putting that topic aside for the moment …Oite oite! That merits an “Oy vey!”
話 (hanashi: conversation)
置 (o(ku): to put, place)