Well, Im not gonna say mine since I don't make funny classes. But you can like make up a class or situation that would deem the class funny.
I'm gonna use my friend's class instead of mine.
Primary: AK-47 w/FMJ + Grenade Launcher.
Perk 1: Bling Pro
Perk 2: Stopping Power Pro
Perk 3: Commando Pro
Why I find it funny: My friend likes being OPFOR a lot. Notice the cliche terroristic-associated weapons.
You can say anybody's classes. If there's a detail like Perks you variate, put "Varies" or "Don't give"
I know somebody is gonna give a certain, famous class. First person to say it gets a cookie. And a cupcake. And TACOS!!!!