Things that N.C.I.S would stand for from A to Z.
(Like the game commonly played!)

A-    Abby/ Awesome
B-    Balls/ Brainy
C-    Comical/ Caffeine
D-    DiNozzo/ Ducky
E- Energy/ Entertainment
F- Fun/ Fantastic
G- Gibbs/Gull
H- Hilarious/ Hinky (Abby!)
I- Inventions/ Incredible
J- Jokes/ Jenny
K- Kick Ass/ Killing
L- Laughable :P/ Love
M- McGee/ Mighty
N- Notorious/ Nutty
O- Outgoing/ Optimistic
P- Pleasing/ Parental
Q- Quirky/ Quality
R- Responsible/ Righteous
S- Smart/ Serious
T- Tony/ Tough
U- Über cool/ ultimate
V- Vital/ Vivid
W- Winner/ Wonderful
X- Xcelent/ Xteme (haha!)
Y- YES/ Years
Z- Ziva/ Zany