찬밥 (신세)
To wear out your welcome

차다
To dump a girl or boyfriend
(the original meaning of the word is to kick something as in foot ball)

철판 (+ 깔다)
To put on a thick skin, to act brazen and shameless

초딩
Abbreviation for 초등학생, an elementary school student

초짜
A complete beginner

총알택시
A taxi driven by a crazy ultra speedy driver.... at the speed of a bullet.