sexton Blake
*correction* Whilst not cockney RHYMING slang, it is cockney slang- cockney slang for Anal Sex or 'buggery'This is slang and this is UK slang but not cockney rhyming slang as best I can determine. Sailor cake or more commonly referred to as navy cake is when two men engage in activities from behind. To be rhyming slang the word cake would have to rhyme with the referent. In this case, it does not. Example; apples and pears for stairs, trouble and strife for wife, china plate for mate. This is straight forward slang such as apron for flag, blagged for robbed or bloody for, well, what ever that is supposed to mean.
Lemon cake = fake
the phrase "dry lunch" refers to someone or something that is boring,eg,"he,s a right dry lunch",theres no rhyming slang involved.Another phrase meaning the same thing is"he,s a right stale cake"
A rhyming word for "six" that you can carry a cake on is "sticks".
Money
well in Scotland we say cake a chocolate that's for like a mars bar ect but i don't think theres slang for a chocolate cake
fake cake
A cake boy is a pejorative slang for a young, metrosexual male.
"a piece of cake"
fake cake
Fake, bake, take, make, lake, Jake, rake, snake...