Many years ago it was common for an aircraft transferring from a low level controller to the high to be told to squawk standby, to free up a code for the low controller. Think they stopped it after Zagreb...
Back to radio calls, overhead in the Great Australian Bight, a very mellow female voice:
"OK ladies and gentlemen, we are going to have a little competition now. If you all..."
The replies:
Whiney voice, "Oh! I wanted to play."
Lascivious voice, "What's the prize??"
Many moons ago on HF in the NW:
FS to RFDS aircraft, "Can you divert to Balgo Hills Mission to pick up a patient with an infected circumcision scar?"
Unknown voice (possibly THREE PILOTS from NWN) interjects, "What, the sharp stone had a bit of dogsh*t on it eh?"