In verses 25-27 Noah pronounced a curse on Ham's son and blessings on Ham's brothers. What Noah said about them also applied to their descendants, as shown in the UDB.
Some translations indent each line of poetry to make it easier to read. The ULB does this with the poetry in Noah's curse and blessings in verses 25-27.
awoke from his wine
He awoke after drinking wine and becoming drunk. He "became sober."
his youngest son
This refers to Ham. AT: "his youngest son, Ham"
Cursed be Canaan
"I curse Canaan" or "May bad things happen to Canaan"
This was one of Ham's sons. AT: "Ham's son Canaan"
a servant to his brothers' servants
"the lowest servant of his brothers" or "the least important servant of his brothers"
This could refer either to Canaan's brothers or to his relatives in general.