More on Twat.....

Don't dismiss this word as a mere swearword or insult.......

Apparently the poet Robert Browning used it in one of his poems.......

Pippa Passes, written in 1841

albeit mistakenly -
but still, it sort of gives the word some authority..........

Then owls and bats
Cowls and twats
Monks and nuns in a cloister's moods
Adjourn to the oak-stump pantry

Apparently he thought it was a part of a nun's habit

and maybe it was.........

ALSO....
Another mistaken (or perhaps dialectal) use was in Lord Lytton's 1870 science fiction novel The Coming Race, in an apparent satire on Darwin:

Among the pithy sayings which, according to tradition, the philosopher bequeathed to posterity in rhythmical form and sententious brevity, this is notably recorded:

"Humble yourselves, my descendants; the father of your race was a 'twat' (tadpole): exalt yourselves, my descendants, for it was the same Divine Thought which created your father that develops itself in exalting you."

So... a tadpole, apregnant goldfish...and a berk.....remarkably versatile word..............