As far as i know is considered one of the many ways to get an = semi-endgame against the BDG. Another les common idea is:
Lemberger Countergambit

The captions on that make it look like it's the GAMBITEER that doesn't even know what he's playing! Is that how it's supposed to be, because I might be missing the point then...
You are.
It's a slam against gambiteers.
The defender is willing to give the player on the white side the benefit of the doubt. He's willing to chalk the man's choice of 2.e4!? up to a richness of spirt. A surpluss of chessboard derring-do. A willingness, nay, a lust to steer well clear of the humdrum beaten path, and in so doing, to become an artist at the chessboard...a "man."
The gambiteer, with his reply, suggests what all "real" chess players believe: that the gambiteer is actually just a twit and a clod, who doesn't know any better than to play this B.S. second move. He has no more artistry, philosophy, or zest for life (or chess) than would a turnip.
As a player of the BDG, I find it delightful that it perpetuates the stereotype. Also as a player of the BDG, I find your response delightbul, because it too perpetuates the stereotype. Way to take one for the team!
And to contribute to the original topic, as a purveyor of fine BDG's: the Lemberger is the defense I LEAST want to see as white. And it is the one I would play as black, if my repertoire included 1...d5.

1.d4 d5
2.e4 e6 !?
French defense
1.d4 d5
2.e4 c6
Caro-Kann, which I prefer over the French as I can use my Bishop pair easier.
But the Lemberger is a nice trick...
What do you think of it?