AITH (n.)
The single bristle that sticks out sideways on a cheap paintbrush.
AMERSHAM (n.)
The sneeze which tickles but never comes. (Thought to derive from the Metropolitan Line tube station of the same name where the rails always rattle but the train never arrives.)
BANFF
Pertaining to, or descriptive of, that kind of facial expression which is impossible to achieve except when having a passport photograph taken.
BEREPPER
The irrevocable and sturdy fart released in the presence of royalty, which sounds quite like a small motorbike passing by (but not enough to be confused with one).
BONKLE
Of plumbing in old hotels, to make loud and unexplained noises in the nigth, particulary at about five o'clock in the morning.
BRECON
That part of the toenail which is designed to snag on nylon sheets.
BUDBY
A nipple clearly defined thorugh flimsy or wet matereal.
CLENCHWARTON (n. archaic)
One who assists an exorcist by squeezing whichever part of the possessed the exorcist deems useful.
CORFU (n.)
The dullest person you met during the course of your holiday. Also the only one who failed to understand that the exchanging of addresses at the end of a holiday is merely a social ritual and is absolutly not an invitation to phone you up and turn up unannounced on your doorstep three months later.
CRANLEIGH (n.)
A mood of irrational irritation with everyone and everything.
DIBBLE (vb.)
To try to remove a sticky something from one hand with the other, thus causeing it to get stuck to the other hand and eventually to anything else you try to remove it with.
DORRIDGE (n.)
Technical term for one of the lame excuses written in very small print on the side of packets of food or washing powder to explain why there's hardly anything inside. Examples include 'Contents may have settled in transit' and 'To keep each biscuit fresh they have been individually wrapped in silver paper and cellophane and separated with courrugated lining, a carboard flap, and heavy industrial tyres'.
A few of my initial favorites from a-d.