Tabbywacker

The male genitalia (penis) when in contact by any means of the female genitalia (vagina).

'Tabby wacker': 'wacker' perhaps meaning the 'penis', and 'tabby' an alternative word for 'vagina' and perhaps from 'pussy(cat/tabby cat)' (?)

I had never heard of this before. Apparently, and quoting an internet forum user, "The Bard (Scottish poet Robert Burns) used the phrase regularly". Is it then a Scottish term?

I don't think Robert Burns used it in his poetry, but I could be wrong.

The poster I spotted using it on an internet forum wrote it as one whole word. I happen to think it is two words, largely to take account of the male and female genitalia separately. It could perhaps be hyphenated (?)