There was a certain skydive pilot at YIFL who was notorious for holding down mic button too long.
''AAX you'll have holding on the drop due outbound traffic from YDKI''
''AAX copy...FUUUU*****''
And then there was the Brissie centre controller who had a stuck mike a few years ago, and continued talking about very very filthy stuff only to follow a couple of minutes later with a ''really?.......sh**!''