I’ll start:
Sailing down the river in a rough cut punt :D:w00t::hehe:
He rattles his bottles in rollocks back yard :D:D
Alpha Kenny body! (say it over and over again till u get it)
I Slit a Sheet, A Sheet I Slit, Upon the Slitted Sheet I Sat.
Mrs Fuzzy Wuzzy has a Square Cut Punt, Not a Punt Cut Square, But a Square Cut Punt.
keep saying
Red lorry Yellow lorry and get faster
so red lorry yellow lorry red lorry yellow lorry
I’m not the pheasant plucker’s son, I’m just plucking pheasants til the pheasant plucker comes.
red leather, yellow leather
round the ragged rocks the ragged rascal ran
I got really excited and thought this thread was about oral sex skills… 
Mel dont need any tips!
I like the kenny one. took me about 10mins though to get it:w00t::w00t::w00t:
i think my name is enough of a tongue twister 
Firefox ache.
Another one to repeat until you’re talking complete gibberish.
A cricket critic.
Peter Piper picked a peck of pickled peppers.
A peck of pickled peppers Peter Piper picked.
If Peter Piper picked a peck of pickled peppers
How many pickled peppers did Peter Piper pick?
A bull on a buell
Król Karol kupił królowej Karolinie korale koloru koralowego
OR
Ząb, zupa zębowa. Dąb, zupa dębowa
My two favourites 
Egy kupac kopasz kukac meg egy kupac kopasz kukac az ket kupac kopasz kukac
:D:D:D
depends how your pronounce buell! 
poslali ma naši k vašim aby prišli vaši k našim. ak neprídu vaši k našim, tak neprídu naši k vašim
OR
pokopete mi to pole alebo mi nepokopete to pole
OR
tridsaťtri prepelíc preletelo nad tridsiatimi tromi striebornými strechami
See, now its just getting silly :w00t::D:w00t:
fe fe…
fe fe fe…
fe fe fe fe fe fe…
…scorchio