Hi, Sir or Madam
I have a problem
There are many words and phrases that can't be found in dictionaries.
for example: geek out, ..poofy, ...He had me in a spatter....the list can go on and on.
I also can't tell whether those words are commonly used and worthy of learning?
How to tackle this problem?
what do you suggest?
thanks

I have some word for you...
just in my opinion

you can find the words and phrases in www.iciba.com and if you want know like "geek out" you need find the word "geek" first then you can find the group in the following...
I feel about the knowleage no problem about worthy or unworthy...
of course in a short term for example you need cross an exam so you can make the need knowleage you want to fix attetion on it, in the life, i think all the knowleage is in need...

This is a common problem

I think this not a difficault