to steal a high 5 intended for another person the consequence is to suck the blocker dry
when tok uuuaak 5 blocked luis, luis had to suck tok uuuaak dry
When you're facebook stalking someone, but their pictures are hidden from non-friends.
Hot girl? Check.
Tagged in the picture? Check.
Clickin' to her profile? Check.
...
Aww, what the heck? I can't see her pictures! Stupid stalk-block!
When you go out in a group and one of your friends wears crocs, thereby preventing anyone in the group from getting tail.
"Omg, I can't believe you let her go out in those tonight. Total Croc block."
Tac-block {tach-blach}
1) n. Someone who prevents their drunk/high/sober friends from attaining the Taco Bell that they crave.
2) v. To prevent someone from going to/getting the Taco Bell that they desire.
1) "Listen man, you're killing my buzz. I'm seriously hungry right now and you're being a total Tac-block!"
2) "I swear if you get high tonight, I will totally Tac-block you. We've already been there four times this week!"
When someone wears the same or similar piece of clothing to the same outing you are at, effectively stopping you from wearing it.
I was totally going to wear my red dress shirt tonight, but Dave cloth blocked me.
similar to being couch locked (being so stoned that you cannot leave the couch and so spend many many many hours watching movies) except you are stuck to a bean bag.
Mary Jane: "Yo, Blaze my friend. Wanna pass me the Doritos?"
Blaze: .........
Mary Jane: Dude, you bean blocked.
When you go into a public bathroom to take a dump and the stalls are occupied prohibiting you from doing your business.
I just went into the office bathroom and I got shit blocked by my boss!