"You canker blossom!" 3 Shakespearean Insults
"quack medicine," c.1600, from Latin nostrum remedium "our remedy," presumably that prepared by the person offering it, from Latin nostrum, neuter of noster "our," from nos "we," from PIE *nos (see us).
nostrum nos·trum (nŏs'trəm)
A medicine whose effectiveness is unproved and whose ingredients are usually secret; a quack remedy.