ATP's were always called Skoda's when I worked on them. Most of the BMA staff where unaware of the name until Bish sent out a memo saying they were not to be called that, then everyone did!
737-200's were Scuds and 500's were pocket rockets.
TU154's were 24hr bombers.
74's were always lumps.
330's and 360's were Sheds.
Metroliners were Death Tubes.
Can't remember any others that haven't already been mentioned.