This is a linguistic term (don’t fall asleep) for when you stick a word in the middle of another word or phrase. Like ‘fan-bloody-tastic’ or ‘abso-fucking-lutely’. It doesn’t have to be a swearword, but obviously swearing’s funny (and big and clever, regardless of what your parents might tell you).
George Bernard Shaw was one of the first writers to bring tmesis to the masses in Pygmalion, published in 1912, when Eliza Doolittle says ‘abso-blooming-lutely’. And in English we mainly use tmesis like this, for comic effect. But as a rhetorical device, it’s been around for a really long time. It started out in classic literature (although not with swearwords sadly). Homer (of Iliad/Odyssey fame) was a big fan of whacking some tmesis in an epic poem, as was Ovid who used it in Metamorphoses (an 11,995-line narrative poem in Latin – woop woop). Shakepeare also jumped on the tmesis bandwagon and used it in Romeo and Juliet (‘This is not Romeo, he’s some other where,’) and Richard II (this one’s a bit harder to spot, but he’s splitting ye old version of ‘however’: ‘how heinous e’er it be’).
The word itself first turned up in the 1550s, and is Greek (although you probably guessed that from the weird-ass spelling). It means, unimaginatively, ‘to cut’.
In Australian English, tmesis is called ‘tumba rumba’, which is obviously a much better name, and one I’ll be shoehorning into every conversation I have from now on. No one knows exactly why it’s called this, but it’s probably down to a poem called Tumba-bloody-rumba (1959) by Aussie writer John O’Grady (about the small town of Tumbarumba in New South Wales). It has loads of tmeses in it, which I’m pleased to say almost all involve swearing. Here’s an extract:
This is a kangaroo I met a few weeks ago when I was in Australia.
“And the other bloke says ‘Seen’ im? Owed ’im half a bloody quid.
Forgot to give it back to him, but now I bloody did –
Could’ve used the thing me bloody self. Been off the bloody booze,
Up at Tumba-bloody-rumba shootin’ kanga-bloody-roos.”
You can read the whole thing here.