「よっしゃーーーー！！！！」って英語でなんて言うの？

When I land a new trick whilst skateboarding I always say 'Yes!'.
The 'Woooo!' is said with a high pitched extended う sound.
'Come on!' is also something that people say when they score a point in sports.

Yes! (exclamation)
Expressing great pleasure or excitement

Example
A: Your team scored a goal.
B: Yes!
__
Whoo hoo!
This is an expression of excitement

Example
A: We won!
B: Woo hoo!

There are many expressions used to show happiness or excitement when scoring in a sport. A very popular, simple expression is "Yes!" This is sometimes accompanied by a hand motion, such as creating a fist, or even a dance. Other expressions include, "nothing but net", which is often used in basketball when the ball goes directly through the hoop, and "that's what I'm talking about!"

Both are ways of expressing excitement.

All of the expressions i have mentioned above are Expression of excitement. Any one of them would be suitable in a situation like this . For example :
A)"Whoo-hoo! i'm on fire!"
B)"Oh yeah! what a goal even if i must say i myself!"
C) Yes!!!!!!!!!!!!!!!! (Shouting at the top of your lunges "

I hope this helps :-)

Above are 3 expressions as examples, but this is a very personal thing! Also,it may seem unsporting to say a lot after scoring against the other team. Most of the expression is usually in a nonverbal way - for example when someone scores a goal in football - very little is actually said.

There are many options for this. Often an affirmative like 'yes' or 'alright' will work but there are many slang expressions as well.

Sometimes expressions that show you are better than your opponent are also used (Take that/ In your face)