ripper
[noun]
Synonyms: dilly, corker, crackerjack, dandy, dinger, humdinger, jim-dandy, lulu, nifty, peach

[TahlilGaran] English Synonym Dictionary ▲

Rip‧per, the /ˈrɪpəʳ/
a name used especially in newspapers and news programmes for a murderer whose real name is not known but who has become famous for killing people in a violent shocking way ⇒ Jack the Ripper, Yorkshire Ripper

[TahlilGaran] Dictionary of Contemporary English ▲