04/12/2014 - Counterpick

Counterpicking is when you pick a character with a statistical advantage over that of your opponent's character. Some people tend to look down upon this practice because certain players say that you have an unfair advantage over their character whilst others believe this is a strategic choice and a matter of opinion.

I believe it is a strategic choice if it is organised that in a best of 5 each player switches sides of who gets the first pick each match, rather than just waiting for your opponent to pick every match.

02/12/2014 - Charge Moves (Charge characters)

A move whose command input involves holding (charging) either a direction on the joystick or button(s) for a brief period of time. This kind of move is most popular in 2D fighters, although it is occasionally seen in 3D fighters (more commonly as a button charge than a joystick charge).
When you've held the direction down long enough for your charge move is ready, charge buffering is preparing a charge move to be ready.

Here is an in depth explanation of charge characters.

Characters often have 2 charge moves, one of them is generally when they hold the down direction then move the joystick up, the other is when they hold the back direction then move the joystick forward. Both of these charges can be buffed by holding the down-back direction ( look at 1 or 3 on the numpad).