What does it mean in cockney rhyme doing up the wilton?

"Doing up the Wilton" in Cockney rhyming slang is a phrase that means getting dressed.

Here's how it works:

* Wilton rhymes with "ilton" in "toilet" (a place where one gets dressed).

* Doing up refers to the act of putting on clothes.

So, "doing up the Wilton" is a humorous way of saying "getting dressed".

It's important to note that Cockney rhyming slang can be quite confusing for non-native speakers, as the actual meaning is often obscured by the rhyming phrase.