A whack is sometimes used to describe a forward slash, such as in an Internet URL. However, it is better to refer to a backslash as a "whack" and a forward slash as a "slash" when using either of them as slang.
Computer folder & file path
C: <whack> Windows <whack> System32 <whack> system.ini
is equal to
A whack is also used after each folder in the folder path. In the example above, "Windows" and "System32" are the folder names in the path.
Lastly, "system.ini" is the file name and is listed last in the folder & file path.
Network folder path
<whack> <whack> ComputerHope <whack> Help <whack> Laptops
is equal to
In a network folder path, the whack is used twice at the beginning of the path. Usually, the name of the networked computer that contains the shared folder is listed after the first two whacks. In the example above, "ComputerHope" is the name of the network server.
After the server name, a whack is used again, followed by a folder name. If there are multiple folders in the network path, a whack is used in between each folder name. In the example above, "Help" and "Laptops" are the folder names.