Of, or like a cracker. This can be cracker in the racist or saltine sense and usually connotes a bleached white, if not pearly and reflective, appearance in addition to whatever other characteristic of crackerism is being referenced.
Roshni's tan had faded under her swimsuit, leaving her now crackery bits exposed.
A racist (toward black people) white person who does crack and talk sh*t about black people being slaves.
JAYDEN:I hate all the balcks! They all deserve to be slaves. *smokes crack* *blabbers on*
ANNA: YOU'RE A CRACKERY CRACKER WHY SHOULD ANYONE LISTEN TO YOU
JAYDEN: you smell of fish, shut up.