1. Someone who is a total douch bag. 2. A worthless person whom no one likes.
3. A reference to someone whom you think is worse then what the actual word itself means.
Joe is such a period chunk, i can't stand that guy.
a large collection of blood coming from the womans vagina during mensturation.
alex: i got my period day
jess: oh is it a heavy one
alex: yeahh i hate that
jess: its worse when u get bad period chunks
alex: yeah they hurt
jess: and make a gross sound when they hit the toilet