What does Y!A mean?
yahoo answers
Other definitions of Y!A:
All of our slang term and phrase definitions are made possible by our wonderful visitors. If you know of another definition of Y!A that should be included here, please let us know.
How to use the term Y!A:
There are no example uses of Y!A at this time. We would greatly appreciate your contribution if you would like to submit your own!
More slang terms:

LEME
let me

4OTS
For old time's sake

88888888
Clapping

EPIC
Extremely awesome