"To jump in the microwave oven"
It's slang for what the drug dealers from Rio de Janeiro do with the police informants (or X9) and his enemies. They put a
person into a pile of tires, they throw some kind of fuel, and then they
set fire on you.
As you must know; it is a horrible way to
die!
Traficante: "Seu X9 filho da
puta, tu vai pular no microondas!"
Drug Dealer: "You mother fucker
police informant, you'll
die burning in fire!"