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1. pound it lock it chain it EXPLOSION *wizard fingers*
When you and someone else, preferably a fried agree on something or say something at the same time and then perform this sequence in awesomeness. Or when something great happens.

1.To "pound it" you must punch each others fist together.
2.To "lock it", you twist your fists in opposite directions signifying the "locking".
3. Then to "chain it", you slide your wrists towards each other.
4. Then EXPLOSION is done by moving your hands away from each other with open hands quickly and saying "explosion"
5. Finally, right after the explosion, you wiggle the fingers on both of your hands pointed at the other person like you are doing a magical spell on them.
Ex)pound it lock it chain it EXPLOSION *wizard fingers*

Brian: I JUST WON THE MARATHON!!!!
Ryan: NICE!! POUND IT!
Brian: LOCK IT!
Ryan:Chain it!
Together:EXPLOSION!

*wizard fingers*
2. smiley chain
Chain with a lock on it used for self-defense or assault. Street term. Some say it has to have TWO locks on it, that the two locks leave two marks on the recipient's head that resemble a smiley face. WRONG! Just one lock is used. Originally it was usually a masterlock combination lock that was used, which is round. The round housing of the lock leaves a crescent-shaped mark resembling a smile. The weapon probably originated as a weapon of convenience -- cyclists had them on hand to lock up their bikes and when attacked they grabbed what they had handy. So it's an effective weapon that can't be called weapon by the cops (if you have a bike, or course!).
Some jackass with a knife tried to take my wallet and new bike, so I caught him upside the head with my smiley chain. At least he still has THAT smile on his face.
3. sock n lock
A home made weapon.
It's made by putting a heavy lock (e.g.: a master lock) in a balled up sock, then in the other from the pair.
It draws from the Morningstar or "mace and chain" style bludgeoning techniques
Its fast to make, and non-assembled is not considered a deadly weapon. It deals far more damage then merely swinging a heavy chain.

Its sometimes referred to as a smiley due to the mark left by the locks bolt.
Back in the 30's, idiots rumbled with chains, bats, and switchblades. Now they rumble with guns, but I still use my sock n lock to bash up the neighborhood cars.
4. Poppin' off the lock
Alternative to "off the chain" usually used to described a party

ALT.A virgin who is about to give it up
Damn that party was poppin' off the lock!

Damn i cant belive sharons poppin' off the lock!
5. Chain Letter
Often created by sad bastards who have nothing better to do with their lives, chain letters usually threaten to do horrible things to you if you don't re-send them to x amount of people within x minutes of receiving them. If you follow the instructions within the given chain letter, then a myriad of wonderful things will happen to you. In order to convince the recipient of the chain letter's power, they commonly incorporate the phrase: "Dis iz so scari cos it actualli werks," or something along those lines. (It may be worth noting, however, that the majority of chain letters' origins lie with illiterates, so they seldom have any grammatical value and can prove very difficult to understand.) Inevitably, the other sad bastards who receive the chain letter believe this crap, and re-send it to all their friends...that is, if they have any...
An 'Illiterate-speak to English' translated chain letter:

"You will have the best day of your entire existence tomorrow if you send this to 1241234234.9238429387423 x 10³ and a half other people within the next 3.3482349872 recurring minutes. Then press F4, F6; hold down Num Lock with your left testicle; press alt three times, with tenuto on the last tap; hit Caps Lock with staccato, with a time signature of 6/8 for the first two bars, then 16/12 for the remaining bars; press Esc. to the rhythm of 'Silent Night'; play the bassline from Beethoven's 5th Symphony in the key of Ab major on the wire of your mouse, with pizzicato throughout; stand on your nose and recite pi in binary. Then, your name, but in Icelandic, will appear on the screen in the font 'Comic Sans'. This is quite frightening because it actually works. If you don't resend this then your Maths teacher will sneak into your room at 12.03 tonight whilst you are asleep and stick photographs of his phallus over your eyes with superglue, so that will be the first thing you see when you awaken in the morning. If you are still awake at 12.03, then he will come out from underneath your bed, chop you up into cubic centimetres and then put you into his geometry set with some kangaroo crap that he measured earlier. Then, you'll get AIDS from a rabid dog that's addicted to crack - who actually mistook you for a schizophrenic next door neighbour - and die from leprosy because Mahatma Gandhi teleported you to Iraq; then t...
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6. hinkey chain
hinkey chain is a type of small flat linked chain used at places like the post office to secure items like a pen or a pair of pinking shears from disappearing which would happen unless they are on a chain
at a hard ware store that sells different kinds of chain you would ask the sales clerk---my teenage children are always losing the remote control. what kind of chain can i buy to secure it fastly to the coffee table and the salesperson would say that 3 feet of their best hinkey chain would solve the problem temporarily until the children get clever and break the chain with a hammer and chisel. so sxchizzle that OK?
OR are you going to lock your bike at the train station with hinkey chain?it will get stolen.
7. Chain Saw Massacre II
When a girl with braces gives you a blowjob, and you wake up the next day with tiny cuts on your dick.
Dayum, that bitch with braces gave me a Chain Saw Massacre II last night
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