This is my first tab. I didn't see this song on here so I thought I'd give it a shot. It 
may not be exactly correct but it sounds right.

Intro:

E:---------------------------------------|
A:---------------------------------------|
D:---------------------------------------|
G:-----------------3-0-------------------|
B:---------5---5-3-----------------------|
e:---7---7-------------------------------|

Verse 1:
C              F             G     Em
He sat in that long line of barber chairs
    C                    F                      G         Em
The sergeant asked him. "son, would you like to keep your hair?"
          C               F                    G        Em
He said, "yes sir," as he heard those clippers buzz and hum.
                    C                  F              G 
(strum once)
The sergeant said, "Well hold out your hands, here it comes."

Chorus:
         C
Semper Fi
      F
Do or die
 D            Am                  G
So gung-ho to go and pay the price
          C
Here's to Leathernecks
               F
Devil Dogs and Jarheads
G                    Em
Parris Island in July
        C  F  D  Am  G
Semper Fi

Verse 2:
C             F                G   Em
I sleep in my bed instead of a fox hole
C                   F               G        Em
I've never heard my boss tell me to lock and load
         C                   F          G  Em
Ain't no bullet holes in the side of my SUV
           C                  F                 G (strum once)
'Cause the kid next door just shipped out overseas

Chorus:
         C
Semper Fi
      F
Do or Die
 D            Am                  G
So gung-ho to go and pay the price
          C
Here's to Leathernecks
               F
Devil Dogs and Jarheads
G                   Em
Parris Island in July
         C
Semper Fi

Verse 3:
Am                                   G
For the few that wear the dress blues
C                F
Haircut high and tight
Em                      G                 C
Who are proud to be the first ones in the fight
        D  C  F  G  F  C  
D  Em
Semper Fi

Chorus:
        C
Semper Fi
      F
Do or die
 D            Am                 G
So gung-ho to go and pay the price
          C
Here's to Leathernecks
               F
Devil Dogs and Jarheads
G                   Em
Parris Island in July
C                 F
Never leave a man behind
  G (Ring out)         E (Ring out)
A Marine, a Marine for life
          C F C D G Em C 
(ring out)
Semper Fi