Wiktionary
interj. oh well; (non-gloss definition: a usually light-hearted dismissal or acceptance of a troublesome situation)
Wikipedia
Hey Ho (What You Do to Me!) is the second studio album by the Canadian rock band The Guess Who. This album is also the last to feature Bob Ashley on keyboards. This album was originally released on Quality Records in 1965. The cover gave credit to "Chad Allan & the Expressions (Guess Who?)". It is regarded as a garage rock album
"Hey Ho" is the third single from Gin Wigmore's first studio album, Holy Smoke. The song was featured in season 6 finale of Weeds.
Usage examples of "hey ho".
If I close my eyes I can still see the way she used to pout with those lovely lips and bring them close to my ear before she hissed out a particularly foul word, then, hey ho!