How to suppress an alert where x=y?

[Qerro]

Don't show a result where the src_ip is X and dest_ip is Y 

index=test    host=test  source=test conn_state=sf   | eval src_ip=x and 

[Qerro]

I was trying to do it with an AND and it kept crushing ! 

Your suggestion helped !  Thank you!

[ITWhisperer]

index=test    host=test  source=test conn_state=sf 
| where src_ip!=x OR dest_ip!=y