Does Dulce Et Decorum Est Mean?

"Dulce et Decorum est" is a poem written by Wilfred Owen during World War I, and published posthumously in 1920. The Latin title is taken from Ode 3.2 (Valor) of the Roman poet Horace and means "it is sweet and fitting". It is followed by pro patria mori, which means "to die for one's country".

What does Dulce et Decorum Est translate to?

Latin. sweet and fitting it is to die for one's country.

What does if you could hear at every jolt the blood come gargling from the froth corrupted lungs mean?

The imagery Owen uses is prevalent in these lines: "If you could hear, at every jolt, the blood/ Come gargling from the froth-corrupted lungs/ Obscene as cancer, bitter as the cud," (Lines 21-23). These lines show that the men were brutally killed in this war.