Shortened version of words such as dick, douche, dumbass, dummy, etc
so u must understand and believe in this one letter and it will all make sense. if u dont understand it then ur too innocent
or ur underage
"i mean that D i took was okay"
"but arent u straight"
"taking D is okay"
"okay i guess"
1. D. Just D.
2. The ultimate response to a question.
Example of 1
Jimothy: D.
Example of 2
Jill: Do you have a crush on Megan?
Jimothy: D.