2. in l337, the "z" implies something not quite legit, so the activity described may be illegal or against the rules.
2. Tina hacked into the school's computer system to change her grades using her hacking skillz.
note: When using the word "skills" after the word "sweet", the final "s" is automatically changed to a "z". See example below.
"I've been working on developing sweet computer hacking skillz all weekend. I will soon become teh super 1337 haX0rz!!1eleven!!"