Pannier

Describes the boxes / luggage holders at the rear of some motorcycles (mainly touring motorcycles)

Peds

See 'Mopeds'

Pillion

Describes the passenger sat behind the rider

Pipes

Describes the exhaust system

Pit

The place where motorcycles are repaired and monitored at a race circuit

Pit lane

The place between the pits and the race circuit used by motorcycles to enter and exit the pits.

Pizza biker

Takeaway delivery riders. Normally ride like complete idiots on small scooters with boxes on the back

Posers

Motorcyclists who have very little experience and cannot necessarily ride yet always have the newest motorcycles and most up to date gear

Power band

The range of the revs that produces the most power

Power ranger

(Generally) weekend warriors with leathers/lid/gear that match the bike, usually on the latest sportsbikes (and no skill to match).