who knows what the word colloquial means

Answer 1

It means 'vernacular' -- a colloquial term is a nonstandard slang or idiomatic word or phrase such as 'duh', 'gonna', or 'dead as a doornail'.

Answer 2

Jack is right. Check these links for more information.

http://dictionary.reference.com/browse/colloquial

http://en.wikipedia.org/wiki/Colloquial