A serpent's tongue noun phrase
Soneone tends to speak in unkind and cruel way that is likely to upset or hurt someone else.
Many people doesn't want to make friends with Sue because she has a serpent's tongue.
The fossil tooth of a shark
A: 'My thesis will center on a serpent's tongue.' B: 'A serpent's tongue? What does it mean?' A: 'A serpent's tongue means the fossil tooth of a shark.'
If you do something or something happens in a blaze of glory, you do it or it happens in an extraordinary and impressive manner.
The band intended to perform publicly and go out in a blaze of glory.