The colloquial "Tom Tit" is the solid equivalent of the liquid "Hit and Miss" one... Or you COULD use micturate and defecate the former being quite obscure..
Baz you know I am from London I have never heard of anything other than "Hug& Kiss" and that thing you have up above was commonly known as a "Pony" you figure it out! &trap.......
Yup Pony and Trap, "pony" that's quite what I've heard also. but NEVER "Hug and Kiss" .. It was always one of the others I listed, Were you born within earshot of "Bow Bells?" because you know what they say !
The comprehensive dictionary of Cockney Rhyming Slang lists no slang phrase with "hug" in it and only a few with kiss. I do believe you're the originator of a new phrase..