Almost Goodbye Puns

My son is almost 2 and he likes to say goodbye to absolutely everything. We were watching airplanes fly by and this happened:

Son: Bye, plane!

Me: That's not a biplane!

Hey guys. I need help with a pun, I've been thinking about it for a while and haven't come up with it. In Portuguese you informally say "xau" when you're saying goodbye to someone (sound's almost as the Italian "ciao"). I have a friend who always makes this funny pun when we're going our separate ways, he always says "Xau-sescu" (Ceaușescu - as in the Romanian dictator) and for a few months I've been looking for a nice comeback to that pun. I was looking for a way to incorporate the name of a dictator and the word "goodbye" (in any language possible), but so far I haven't been able to. Could you guys help me out? In my native language, Portuguese, I haven't come up with anything cool (my knowleadge in dictator's names is also not very vast).

Thanks!

For a little bit of background information, my dad suffers from multiple system atrophy and got a high fever, which turned out to be from a bad urinal tract infection. He has been at the hospital for almost 2 weeks now, and it is really hard on our family, but he is doing his best to get better and throws this small dad joke to lighten me and my brothers day.

A Speech Therapist comes every day to help him focus on his muscles in his face to help him swallow and speak clearer with simple gestures of noises and deep breathing. As she was done with his exercises, she said to him "Can you say goodbye, have a nice day! in a long sentence?" (As in one breath with no pauses). My dad then takes a look at me and my brother and says in his slurred voice "goodbye... have a nice day... in a long sentence".

The Speech Therapist just smiled and shook her head while we facepalmed...

Thumbs up Dad, I know you will come home soon!