shirt block 

The act of taking a marathon finishers shirt that is too big for you for no good reason (ie. I can "sleep in it" or my kids would like this shirt), leaving only smaller shirts for the later, chubby runners.

WRM race worker: what size shirt do you want?
skinny/fast runner: Give me an XL, I can sleep in it.

(...much later...)

chubby/slower runner: Can I get a finisher shirt?
WRM race worker: All we have left are Small and Mediums
chubby/slower runner: Those twigs shirt blocked me!

shirt block by 4jarvis December 3, 2011

shit block 

When you are at work and you are taking a shit and another co-worker walks in the restroom and notices the locked stall door and walks right back out.

"I was taking a shit and Aaron took one step in the restroom and walked right back out."

"Yeah dude, thats called a shit block"

shit block by Lewy23 April 22, 2008

shit block 

when you go to five guys and see who can last the longest without shitting

yo man i gotta shit
if you do you lose the shit block game brah

shit block by sparrer547 April 25, 2010

shit block 

when you take the nastiest shit when your boy and his girl are making out in the other room... this shit literally interrupts sexy time.

Tom is making out with Sharlene so i guess its time to make anal explosion (shit block) to disrupt sexy time.

shit block by crazy brown man December 24, 2008

shit block 

When you glue yor ass together and try to take a shit but it's blocked by your ass.

"Yo, Louie, why are you so red? Oh, it's because you had another shitblock. dumbass."

shit block by John lush March 7, 2003

Black Shirt 

A man feared for his ability to run you over, strip the ball and return it for a touchdown.

The Black Shirts are the best defense in college football

Black Shirt by Anonymous September 13, 2003

shit ice block 

when you shit in the freezer and when its frozen you stick it back up your butt and wait for it to defrost then shit it out again

hey man whatd you do yesterday, i took a shit ice block

shit ice block by daddy oh November 14, 2016