。
Talk of next year and the demons will laugh.
Literal
Next-year [possessive-の] thing [object-を] say-[if-ば] demons [subject-が] laugh.
A well-known Japanese ことわざ (proverb): 来年のことを言えば鬼が笑う. Meaning: 'it's foolish to make plans for the distant future because nobody knows what will happen.' 鬼 here are the mischievous demons/ogres of folklore, amused by human hubris. The ~ば conditional frames the general truth.