"It is a cool way of saying goodbye to a friend too, or a possible replacement for "peace."
See You Space Cowboy...

Community Guidelines
Please respect the following community guidelines to maintain an enjoyable environment:

Keep conversation respectful, without personal attacks
Don’t blow up other members’ feeds. If someone isn’t responding to you, let it be
No pornography
Keep out behavior that could be seen as trolling/spamming
Relax, be yourself, and enjoy