foreigner forgather - A tourist information office
basenji barramundi - a dog-fish
mastic materia medica - When chewing-gum will do just as well as sutures.
tucker tumult - An Australian roadside café
yelp-yoicks - The unmistakable sound that lets you know you've stumbled upon the ultimate pastime of the in-bred classes.
Demisemiquaver demy - Paper used for taking quick notes.
fission fixative - Irresistible force meets immovable object.
escort erratum - When that bubbly blonde you were expecting turns out to be an out-of-work actor called Randy.
damper darbies - Those fur-lined handcuffs used for stag and hen nights.
Gorgonise goodbye - The stare that your host gives you when you realise that you've outstayed your welcome.
Tartar tarantism - The dance of the whirling dervish
uneconomic undertaking - A completely viable business plan until Andersen consulting get their hands on it.
Vexatious vicereine - a right madam
rancid rans-des-vaches - A yodeller's breath.
foolhardy folio - That novel you promised yourself you'd always write and which turned out to be a complete waste of time.
immedicable image - Your passport photo
Panamanian palm - the term given to the covert handshake between a central American country and a superpower which inevitably leads to their mutual betrayal.
Posterity poteen - That wicked distillation method which is augmented with each passing generation by the addition of a teaspoon of sugar.
nuncupate nyctitropic - A man's way of telling his wife that he knows his way to a night-time party and does not need to stop to ask directions.
moderate mnemonic - memory aids for the lazy.
embassy emeritus - an unofficial title for a foreign diplomat who manages to complete his tenure without making a complete balls-up.
purgative punishment - A very messy end.
scrupulous scribble - To draw like Picasso
{All OED 7th Edition}