That fucking silly bastard derick nobcheese illustrates perfectly the way the english language endures bastardisation with his shit explanation of said word:

Atomic Kitten have bastardisation
a song again!
Apple have bastardisation
microsoft, or tried to.

See? The silly fucking dumb cunt.

Bastardisation, the process of, is a corrupted copy of a given original.

"allow it" means to just leave something alone, or don't worry about it. People in West London say this quite often.

To bastardise something.
To make something very uncool out of something that used to be cool.

derick nobcheese's entry is a perfect example of a bastardisation of a definition.

A cover version of something, most commonly used as a musical term. Used to describe a 'song' as worse than the original or any predecessor.

When something is poorly done in an "individual style"

Well, Bastardisation is a rterm given to the process of becomeing a bastard, or being a bastard, or even the term used to describe someone who has encountered the acts of a bastard.