Worldjem was faster than me, but I was halfway done so I decided to post this anyway in case it is helpful to you. If you have other questions, please ask.
Don't worry about your english. I know how hard it is to speak another language to people who speak it natively.
1. Air dash momentum means that if you do an air dash move, and then press another move while air dashing, you will maintain your momentum. You will keep moving forward even though you did an attack while air dashing.
2. Hitstun is the amount of time that a character stops doing things after they are attacked. You must wait until hitstun is gone before the character can do anything. Medium moves like MK and MP have more hitstun than light moves like LK and LP. Heavy moves like HK and HP have more hitstun than medium moves and light moves.
3. Block animation is what your character does when they are blocking an attack. The animation that the character makes while blocking is a defensive position.
4. Hitstop is the amount of time that the both characters must wait when an attack hits. After hitstop ends, the person who is attacking will be able to do another attack, and the person who is being hurt will go into hitstun.
5. Blockbuster is the Skullgirl's name for a super move. There are many blockbusters, and the buttons that you need to press for each character's blockbuster moves can be found in the list of moves for each character can be found in the Skullgirls game.
6. Projectiles are things that a character are not connected to the character's body. They fly through the air. Peacock shoots many projectiles. Examples of projectiles include Fukua's fireballs, Peacocks bullets and bombs, and Double's gun attack.
7. Whiffing happens when you perform an attack, but it misses the opponent. It does not hit them in any way, and they do not block it. That is a whif.
8. I'm not sure exactly what you mean by fluid animation when talking about Skullgirls. Could you explain this a little more or say where you heard this?
9. Ultimate Showstopper is the name of a lvl 1 super move for Cerebella. It is done by performing a circular motion (also known as a 360 motion) and pressing (LK + LP).
10. Blockbuster sequel is also known as a DHC. It occurs when a character does a super move, and then before that super move ends the player inputs their next character's super move. The second character will perform their super move. You must have at least 2 super meter in order to do this.
Here is an example:
Notice how Cerebella does a super move, and then before she is finished Double comes out and performs her own super move. This is the blockbuster sequel or DHC. Does that help?
11. Road Roller is an item that Peacock can drop with her Shadow Of Impending Doom attack. This item drops randomly. It is very large, and does extra damage when it falls on your opponent. It only has a chance of appearing if you hold down the item drop buttons for the longest possible time.
12. Knockback might refer to an effect that some moves have. For example, Big Band's regular HK will push the opponent to the opposite side of the screen. It will "knock them back" to the opposite side.
13. An outtake is also known as a snap or a snapback. It forces the opponent to switch out their current character to whichever other character you choose. The character that is forced out depends on which buttons you press. It occurs when you perform a quarter cirlce forward motion and hold down either (MK + MP) or (HP + HK).
14. I'm not sure exactly what you mean by crosshairs when talking about Skullgirls. Could you explain this a little more or say where you heard this?
15. Airborne means that the character is in the air. They are jumping or do not have their feet on the ground in some way.