What does it mean when Meredith and Derek call post it?

Whenever they would fight or have a serious issue with one another, which happened fairly often for a couple as in love as they were, they would call "Post-It" and that would effectively stop the argument.

What episode does Meredith and Derek post it?

6. Season 5, Episode 24: Meredith and Derek Have a Post-It Note Wedding. Meredith and Derek end up giving their wedding to Izzie and Alex — which isn't really a big deal, since they were never big wedding people anyway.

What is the last thing Derek says to Meredith?

“There comes a point where the desire to rest overrides the desire to live,” Derek says, before telling Meredith that her final words to him “gave me everything I needed until my last breath.”

Who was the first guy Meredith slept with after Derek?

The first real relationship Meredith had after Derek's passing was with Nathan Riggs. Dr. Riggs and Dr. Grey started things in Season 13, though not one, but two love triangles soon got in the way of their romance.