period chunk 

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

period chunk by dave the bricky January 16, 2007

period chunk 

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.

period chunk by crank April 25, 2005

periodchuk 

When a woman on her period smacks you in the face with a used douchebag... like a nunchuk

whaa-" touches cheek "oh, man my girlfriend is on her period, she just whipped me with her nasty periodchuk

periodchuk by Millcat January 12, 2011