P IS FOR...
PELLUM - PILLEM
Dust
"Dawnt 'ee go up thikky tallet, cuz you'll kick up 'th Pellum 'n twill make a master mess"
PIXIE FLAX
Cotton Grass

PLANCIN',PLANCHEEN
Planking, Floorboards

Also heard it pronounced Planchin. "I have always been the one that has had to scrub the Planchin's, which is why I suffer with House Maids Knee!"
PIXIE LAID, PIXIE LAID'N
Led astray by the Pixies

If someone drinks too much and gets - as we say in Ashburton - 'Shamfered up' (drunk), and their feet go backwards but they want to go forwards, they are accused of being 'Pixie Led'.
PAUCHED
A field cut up by stock, making it stoggy - stogged.
POPPLES
Pebbles

This word according to 'the oracle' at Exeter comes from the word Papolstanas and according to him/her relates to, say, Newton Poppleford, (A new town next to a poppled ford!)

POOK
Haycock

A pile of hay after it has been 'Tedded' (turned), which is collected and made into a 'Rick'
PAIKE
Tardy Person

Also I have heard it said to be someone just poking about and not getting on with thinks is said to be 'Paiks'n 'bout', "Paiks'n 'bout doin' nort" Also 'Paiken' - to doodle
PINSWELL
Small boil or Abcess

PUSKY
Short of breath