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1. T-Pain's gay brother, Dick Pain, which is shortened to D-Pain.

2. Also standing for dick pain but in the literal sense of a tingly pain in the dick or genital area. The sensation can be acquired from everyday situations to which the penis becomes excited for no reason or from prolonged sexual intercourse. D-pain can also be said for no apparent reason or to describe something good that has happened.
1. You look like T-Pain's gay brother, Dick Pain.
-Don't you mean D-Pain?

2. The Cheese Machine comes in different colours. It comes in cheese, and it also comes in a machine type colour.
-Ooh, Oh my god, I just got a little D-Pain.
by tinymonkeyeater January 03, 2011