how do you dispose of semi-fluid food waste?

I sieve it over the sink and put the solid parts in the food bin.

I’d freeze it, and then just put it in the food waste bin the night before collection. I often freeze anything smelly or that will attract flies in warmer weather (e.g. a chicken carcass after I’ve used it for stock) and put it in the bin the night before. I use the little compostable bags.

Even if you don’t have a food waste collection, could you freeze it and put it in whatever bin the night before?

I have to say that, considering the size of some things that go down the toilet legitimately I really can't see how a few bits of meat and veg are going to block it...

Have you ever blocked your toilet doing this, Fennel?

My council would not allow us to do that MawtheMerrier, we can’t put food in the garden waste bin because it’s shredded and used as compost so no meat is allowed.
I put food in a sieve and run water on it to get the liquid out, then put it in the food waste bin. We aren’t allowed to put any food waste in the general waste bin either, it’s all very strict on recycling here.

I drain off the gravy and pour it away down the sink with the tap running. I put the sold pieces into newspaper in the bin. I had been making the mistake of putting the oil from tuna down the sink - outside drain is a horrible mess. I now pour it onto a piece of kitchen towel and bin it.

I wouldn't put it down the toilet, just in case, nothing worse than an overflowing toilet.

I mix it with cooked brown rice and give it to the chickens.

I put it in the green wheelie bin we have for garden and food waste.

I sieve it and empty the sieve into the bin

I strain the liqued down the sink with hot water and washing up liqued and put the solids in food waste bin.

I put it in the biodegradable bags our council provides for food waste. Into the green bin it goes

Yes, it could block the toilet. My leftovers go into the small green waste bags which in turn goes into the large brown food waste bin…. Which is then placed outside once a week for the dustman.
Your Council probably has other ways and means. Check with your neighbours -

I don't know, I give things like that to the dog.

I don't see any harm in putting it down the toilet as it's biodegradable, not like wet wipes and other things people put down the toilet (and I do know that they shouldn't).

If the chorus of disapproval is too great I would strain off any liquid, wrap the rest in newspaper and put it in the dustbin
Or you could dig a hole in the garden and bury it...