The 4 pawns gambit
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White sure is up a lot on development, but none of it was forced, so he may end up with just a couple pawns down for no good attack, if Black decides to develop something or shoot back a d-pawn or other standard anti-gambit efforts.
By the time Black gobbles the 4th pawn, he's probably lost. Ne5 could be a problem.
However, after f4, d5 might be the antidote.