I'm going to post a pepe meme in my work slack channel
I'm not sure why you would want to post a pepe meme in your work slack channel?
Because it's funny. I'm bored of my work channel being serious. We need some humor.
You shouldn't post offensive memes in a workspace. It's rude.
What's offensive about a little frog. It's nerd humor.
If you're at work and you are posting "memes" then you could get into trouble regardless of it is funny or not. Are you sure that you want to take that risk?