Interjections, of excitement, or emotion

Millennial/collegiate terms
1.Sweet
--Freakin' sweet
--Friggin' sweet
2.Oh snap
3.Crap
--What the crap
--Holy crap
4.Heck
--What the heck
5.Dang
6.Darn
7.What the flip
8.OMG (collegiate variant of Gosh)
9.Oh my lanta
10.Fo sho
11.Fur real
12.Dude
13.Awesome
14.Yay
15.Wicked (with awesome or sweet)
16.Totally
17.Hi

Generally common
18.Geez
--Gee
--Possible oldies variant: Gee whiz
19.Gosh
--Oh my gosh
--Millenial/collegiate variant: OMG
20.Wow
21.Arrgh
22.Yikes
23.Holy cow
24.Oops
25.Uh-oh
26.Hey
27.Oh boy
28.What in the world
29.Whoopdedoo
30.Cool
31.Nice
32.Yuck

Uniquely mine
33.Sheesh
34.Phooey
35.Oh my
36.My goodness
37.Yahoo

Extreme oddities
38.Blast
39.Great Caesar's Ghost
40.Fragonard
41.Curses
42.By the beard of Zeus
43.By the hammer of Thor
44.Holy colon cancer

Oldies
45.Sweet Jesus
46.Crickey
47.Gee whiz (possible variant of Geez)
48.Rats
49.Geeminee
50.My word
51.Fiddle-de-dee

This is the halfway-done draft of a paper I'm writing for grammar class... all about exclamations/interjections that I've heard people use. Yes, I really do know people who say all of these. Including Great Caesar's Ghost.

A very funny part: The same friend of mine says sweet Jesus, crickey, by the beard of Zeus, by the hammer of Thor, and holy colon cancer. He's twenty-two.

All together now:
Interjections (Hey!) show excitement (Yow!) or emotion (Ouch!).
They're generally set apart from a sentence by an exclamation point,
Or by a comma when the feeling's not as strong.
--courtesy of Schoolhouse Rock.