ka-slap-clap
the sound when two blubbering blobs bonk each other in the vacuum of space like it’s a meatball toss
"I swear I heard the ka-slap-clap from the space station."
He texted me: "Just saw two astronauts having a snack in zero gravity. It was a ka-slap-clap."
My dog heard it and started howling like it was the end of the world.