Lock And Chain

a sexual act in which your partner does a handstand behind you facing your backside, while you secure the legs, they pull your penis backward between your legs and start a fellatio while maintaining the handstand and grip

The act of hooking chains on the backs of two trucks or cars, then driving in opposite directions to see which truck is more powerful. Occurs often in the boondocks in the south, done to pass time.

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.