The great thing about having a friend like Yondu is that you can tell him to shut up without wounded looks. Whether or not he'll listen is hit or miss and dependent entirely on his whim, but he can take it. He knows the type of friends he chooses.

He's in the middle of a drink when the chorus of 'shut up' rings and he makes a couple of sounds into his drink, and whatever they were meant to say is completely lost because his mouth is busy. If it was important, it doesn't matter anyway.