What do you consider the most difficult tongue twister?

I slit a sheet,
A sheet I slit,
And on the slitted sheet I sit

One mah mom tawt me whin I wuz a younker:

The big black bug bit the big black bear.

Right ring, white wing, right wing, white ring.

Try this one:
She stood at the balcony door, inexplicably mimicing him hiccuping, but amicably welcoming him in

It is the middle phrase that is the killer!!

Gp

The version from my high school drama class:

Give me the gift of a grip top sock
A clip draped, ship-shape, tip-top sock
Not your spin slick, slap stick, slip-shod stock,
But a plastic elastic grip top sock.

I actually think this one is pretty easy as tongue twisters go, although obviously this version doesn’t have 60 lines.

The hardest one I know is:

Unique New York
You need New York
You know you need unique New York

It’s funny how some of these pose no problem for me, and yet some just absolutely slay me.

rare white rhino

A skunk sat on a stump. The stump thunk the skunk stunk. The skunk thunk the stump stuck.

I remember this one from an episode of Animaniacs many years ago.

Picky pickle picker.