The term most commonly used for SQL injection. SQL Injection is when a user inputs a certain code into a PHP automated form which is vunerable so that the user can obtain valuable informaion, ex. a list of passwords.
You go to a forum and do a member lookup on x' OR 'x' = 'x
The mySQL query would look something like SELECT * from members WHERE user = x' OR 'x' = 'x'. This query, instead of returning the member "x" would return every member in the database. This isint useful, but in other cases it would be.
When you search this, it means that you have been COMPLETELY engulfed by boredom that you have invented the most complicated combinations of typing key letters, INCLUDING NUMBERS.
if you try typing this phrase you will get what I mean.
me:*types zaq`/'\=xsw1.;-cde2,l0vfr3mkp9bgt4njo8hy5u76*
others: This guy has to have 250 iq.