The one tossed around when I was a kid was:
"black bug's blood" <- Repeat 3 times fast
It's similar in nature to the "Peggy Babcock" and "Good Blood Bad Blood". Speaking of which... Are they all known as "Tongue Twisters" or are there different types. So far I see that most fit into one of two challenge categories:
#1 Try to get to the end of the sentence before you bumble (or would that be mumble?).
#2 Repeat the phrase a specified number of times before you stumple
Looking at them from a phonetic & structural point of view there are other similarities to note:
#1 rhyming
#2 cadence/syllable length
#3 words sharing the same first/few letter(s)
#4 story telling/correct sentence structure
#5 just throw some words together as long as it's hard to say
There are more I'm sure. I'm just wondering whether there are any rules governing creating a tongue twister or if there are any defined categories and such with which to label certain types of tongue twisters.
Also, on a somewhat unrelated front, would knowing a non-English dialect make certain English tongue twisters easier. I mean I couldn't say "Peggy Babcock, Peggy Babcock, Peggy Babcock, Peggy Babcock" succinctly if my life depended on it, but perhaps this is a piece of cake if you speak Tagalog. I'd be interested to know if any of the multilingual members find this to be true.