Cockney Rhyming Slang, has it ever left you baffled?

[horseless carriage]

Have you ever come across Cockney rhyming slang? Here's an example: The dog & bone is the phone, but when used the rhyming word is omitted. "She's on the dog," isn't as rude as you might construe, it's simply that the word bone, which might have helped explain, has been omitted.

Others, that are more common are: Telling porkies. That's Porky pies....Lies. Look out, trouble's here. in this sentence trouble is trouble & strife.........wife.
Do you know any that are amusing, or baffling? Here's one that is common here in the UK. A toupee is know as a syrup. That's syrup of fig......wig.
So when you hear the term: He was wearing a dodgy syrup, he probably looked like this:

 

[Flarbalard]

I have never understood it. I don't know if I could grasp the context of trying to figure out what someone was talking about by figuring out the rhyme.

I knew what telling porkies meant, but I didn't know the origin. Thank you.