sick as dick

Sick as Dick is when something is crazy good, very enjoyable or impressive. Normally used as a reply for something awesome that is mentioned to you . You would normally only say it amongst close friends, and usually followed by a shakas.

"I justbfoubd out Inhave tomorrow off"
"Sick as Dick".
Similar to "sweet dude" or "nailed it" or "whoa dude" or "that rocks".