Before we start learning how to make these classes say the N-Word, we need to learn some advanced tech.

TECH: Voice Line Cancelling

Although valve nerfed this tech in the new patch (can't cancel voicelines by jumping in water), this tech is still the bread and butter of making classes say the n-word, or Racism Cancelling. To preform a Voice Line Cancel, you need to interupt it with two things, a taunt or another voice line.

* Cancel with a voice line: This is more difficult to do as voicelines usually last for a long time, however and easy way to preform this is to take self damage (either through fall damage, or through blowing yourself up, as these trigger a hurt voice line.
* Taunting: This is the easiest and most consistent way to Voice Line Cancel. Although technically it is cancelling it with a voiceline, it is considered seperate within the PTNL (Professional TF2 N-word League.) To preform this, you must start a taunt with an immediate voice line, such as the Manrobics, or most constitently, the Shaudenfreude.
* NOTE: TIMING IS TIGHT FOR THIS, PRACTICE MAKES PERFECT!

WHAT COUNTS AS CONSISTENT

Under PTNL (Professional TF2 N-word League) rules, a consistent N-Word is one where a line starting with "Need a" or a line that says "Negative" is cancelled with the previous afformentioned tech.

HOW TO PREFORM ON EACH CLASS

1. SCOUT: Scouts "Need a teleporter here", "Need a dispenser here", and "Need a sentry here", can all be cancelled consistently with a dance taunt or a Shaudenfreude.
2. SOLDIER: Since Soldier has multiple "No" voicelines, the one where he says "Negative" can be cancelled, but not consistently. He does not have any other way to say it.
3. PYRO: Do I even need to explain myself? Just listen to him in game, he's off the rails.
4. DEMOMAN: Not suprisingly, Demoman has the best N-Word cancel in the game. His "Need a teleporter here" voiceline is the most consitent, and argueably overpowered in the game.
5. HEAVY: Heavy has no voicelines and is not racist.
6. ENGINEER: This one is a bit controversial, but its allowed in league play. His "Need a Dispenser Command" starts off with him saying "WE need a." As such he can call his entire team the N-Word, but not individuals.
7. MEDIC: Medic can almost say it, but his Shaudenfreude starts too late, and one of his "No" voicelines says "Nichts Da" instead of "Negative" so he is not viable.
8. SNIPER: Sniper is simple enough. His "Need a teleporter here," "Need a dispenser here," and his "Need a Sentry here," can all be cancelled.
9. SPY: Spy is very well adjusted and polite and would never say it.

  
This concludes my guide, and remember, practice makes perfect!

What TF2 Classes Can You Make Say the N-Word? (TUTORIAL IN COMMENTS) (SERIOUS)