Colloquialisms

A colloquialism is a term that is used when someone is talking in every-day conversation - i.e. not using your "telephone voice and manner".  It is associated as being part of your heritage - your local language if you like.

"Crack" This is not drug related when used in a sentence like "The crack is good"!  It means that the conversation and general atmosphere is good.
"Peedie" This is really an Orcadian word meaning small.
Burn A stream.
Loch A lake.
Haggis A small six legged creature that has a tendency to run round hill tops, normally in the same direction due to peculiar characteristic of having either the left hand or the right hand legs, shorter than the others.  They are shot and eaten as a delicacy in Scotland. 

NOT!

Haggis is a meal (traditionally a stuffed sheep's stomach) made of minced offal and oatmeal.  Traditionally served on Robbie Burns' Night with clap-shop (mashed potatoes and turnip). 

Kilt A large skirt-like garment, made of wool (and very heavy).  It has many pleats in the tartan material.  Different "clans" have their own tartans.
Sporran Small "purse" or "bag", usually worn to the front of the kilt - who knows what a man keeps in his sporran?
Oxter The underarm.  Often referred to as the oxter pocket.