Obfuscation
Software code or instructions that works, but has been purposely complicated to help conceal what the code performs. The programmer may do this to help prevent the program from being modified or stolen by other user or to help prevent someone or another program from reading the code and understand its true malicious intentions. Below is an example of an obfuscated batch file that prints GOD BLESS YOU! taken from the Computer Hope forum.
@echo off
setlocal
%1 %0 :: A B C D E F G H I J K L M N
O P Q R S T U V W X Y Z
set A=%5&set B=%6&set C=%8&set D=%3
for %%? in
(1 2 3 4 5 6 7 8 9) do shift
set A=%C%%7%A%&set C=%D%%4%B%&set D=%7
for %%? in (1 2 3 4 5 6 7 8 9) do shift
echo %A% %C%%2%2 %8%D%%4!
Also see: KISS, Programming definitions, Security definitions, Spaghetti Code