game

when you want to do something

Example:

Anyone game for a drink?

gander

have a look

Example:

Let't me have a gander at your new cell phone.

geek

1) a bad person or 2) a hardworking student

Example:

1) He's a geek. 2) Joe's a real geek, he never stops studying.

genine article

the real thing

Example:

His Rolex is the genuine article. Mine is not!

get down to the nitty gritty

look at the details

Example:

No more excuses. I want to get down to the nitty gritty. What are the problems?