There is no abbreviation as such but you can remove the file/folder name or the avast context menu integration from being displayed by modifying the avast5.ini file.
- Context (right click) Menu, very long file names how to change the display so as not to show the file names:
Using notepad, open the C:\Documents and Settings\All Users\Application Data\Avast Software\Avast\avast5.ini (XP file location)
C:\ProgramData\Avast Software\Avast\avast5.ini (Vista, Win7 file location)
Now find and edit the [UserInterface] section, add the new line after the label, ShellExtensionFileName=0 and save the file the avast self-defence will ask for confirmation.
[UserInterface]
ShellExtensionFileName=0
To Remove Shell Integration - use the ShellExtensionFileName=-1, to turn off the avast shell integration completely. (Note the value - minus 1)