nounslang, dialect Scottish
A weapon; especially an open razor used as a weapon.
1970s. Origin uncertain; perhaps shortened from Malcolm Fraser (or Frazer), presumed rhyming slang for ‘razor’, although this is otherwise unattested and no connection with any person of this name has been established.
verbslang, dialect Scottish
To do violence to (a person), especially to wound with an open razor.
1970s. From malky.