rap

English as a Second Language English Vocabulary, Grammar and Idioms
1
  1. He was not guilty, he just took the rap.
  2. He was getting one bum rap after another.
    Please explain their meanings.
2

Two completely different idioms. Take the rap means take the blame: idioms.thefreedictionary.com/take+the+rap

Bum rap means an unjust punishment: thefreedictionary.com/bum+rap