Focus:  Expressions.

• "Have a go" = TRY.  I want to have a go at that math problem.
• "Go down" = HAPPEN.  What went down at the party yesterday?
• "Goof up" = MADE A MISTAKE.  I really goofed up at work yesterday.
• "Grand" = 1 thousand.  I need to save about a grand to fly home next year.
• "Groovy" = Strangely pleasant.  That band's music last night was really groovy.

http://users.tinyonline.co.uk/gswithenbank/sayindex.htm