This isn't exactly what they play in the song. Its just a version I made up.  
In the first verse, any random finger picking pattern should work 

Standard Tuning
Am(Maj7) xx2110
Cadd9      x20010
E7             020100
Asus2      x02200
Am           x02210
Dm           000321
F               133211
F*             668886
G              320022
C              x32010
C*            x35550


Let me tell you...
Am
I see you girls checkin' out my trunks
Cadd9
I see you girls checkin' out the front of my trunks
F
I see you girls lookin' at my junk
          E7
Then checkin' out my rump
E7
Then back to my sugalumps
Am
When I shake it, I shake it all up
Cadd9
You'd probably think that my pants had the mumps
F
It's just my sugalump bump-ba-bump
            E7                                 
They look so good, that's why I keep them in the front
Am      G          C            F           E7
All the ladies checkin' out my sugalumps
F                  E7
They drive the ladies crazy
Am
All these bitches checkin' out my britches
Cadd9
Put 'em in a trance when I wear track pants
F
My dungarees make them hungry
E7
They're over the moon when I don pantaloons
Am                                                    Asus2
My sugalumps are two of a kind
Am                                           Asus2
Sweet and white and highly refined
Am                                                      Asus2
Honeys try all kinds of tomfoolery
Am                                  Am    Asus2 Am Asus2
To steal a feel of my family jewellery
Am                                              Asus2
My candy balls cause a cafuffle
Am                                                             Asus2
The ladies, they hussle to ruffle my truffle
Am                                                Asus2
If you party with the party prince
          Am                            Am Asus2 Am Asus2
You get two complimentary after dinner mints
Am
Girls surround me when I'm standin' on the stoop
Cadd9
Givin' me gifts like free chicken soup
F
Book tokens, free chicken stoop
E7                                                                  F  E7 F
Standin' on the corner goin' ss-ah-ss-ah
Am
We see you girls checkin' out our trunks
Cadd9
We see you girls checkin' out the front of our trunks
F
We see you girls lookin' at our junk
E7
Then checkin' out our rumps     
Then back to our sugalumps

(Instrumental (to the rhythm of the percussion) Am  Am(Maj7)  Am7 Dm E7 

C  D

F*                                 C*                              Gm7
All the ladies, they want a taste of my sugalumps
C
Sweet sugalumps, yeah
F*                       C*                                    Gm7
All the ladies, they want a taste of my sugalumps
C*                                          F*
Sweet sugalumps, yeah