Meaning

• The B-side of a phonograph record.

  "Nice tune, what's on the flipside?"

• A necessary consequence or corollary of something; especially one seen as opposite, or as pro versus con.

  "Walking to work is definitely healthier – on the flipside, though, it takes twice as long."

• The occasion when we meet again (e.g. when I return from work, etc.; said on parting); later or tomorrow.

  "See you on the flipside!"