Can someone tell me what Drop Tuning is?

Hey powerman all depends which one like Drop D [tuned low to high DADG] or like drop tuning all of your strings well i know alot of the other people know more than i do so i hope that helps some.

How would i tune it to Drop D?

There are Altered Tunnings, and Droped tunning. (Of course there are more terms, but wont explain here.)
An Altered tunning is like Michael Manring uses, he choosed the keys for his string tunnings.
Now a Dropped tunning is jus lowering the pitch of a standard tunning.

If we say Dropped-D it goes like this.
E = D (You lower the note 1 whole step)
A = A
D = D
G = G

Other Whole Dropped tunnings are like this:
Dropped Eb tunning
E =Eb (You lower the note 1/2 step)
A =G# (You lower the note 1/2 step)
D =C# (You lower the note 1/2 step)
G =F# (You lower the note 1/2 step)

Get the point??

i got it thanks