Up side. = Good things.
いい側面。 Down side. = bad things.
On the up side our sales have improved, but on the down side our profits have decreased.
a.k.a. = Also known as.
Hideki Matsui a.k.a. Godzilla plays left field for the greatest baseball team in the world ; the New York Yankees.
Pouring rain. / To rain cats and dogs. = To rain extremely hard.
I got caught in the pouring rain and I got soaked.
To spell out = To explain completely and carefully.
In New York city you had better spell out directions to a taxi driver.
Hip = Modern,new,chic,up to date,sharp or in fashion.
A hip new disco has opened recently and I'm going to check it out.
Now and then. = Occasionally.
I don't go there so often any more, I only go there now and then.
Every so often. = Not really that often.
I seldom hear from them, but every so often I think of them.
To blurt out. = To say something without thinking.
Before I was able to ask him, he blurted out his name.
Touchy = Very sensitive
You should never ask women their weight as they are very touchy about the topic.
Pudgy = A little fat or a little overweight.
He hasn't trained for a few weeks and he also has been eating quite a lot, so he's starting to look a little pudgy.