Short for diciple number 2.
D2 belongs to the well know religion of Leonard.
Where Leonard is like God! More awesome than Chuck Norris!

a badass son of a mothers lover who drives a blue mazda

Every sinlge person is born with a fully functional D2, there have been very few recorded cases where a D2 has been under developed.

R2 is also part of the equation.... rare cases are 10% of the human body consistes..... dumbass

designated driver.

both words start with d, two words = d2

The second dump in a day.