"You canker blossom!" 3 Shakespearean Insults
1580s, from Middle French grommeler "mutter between the teeth" or directly from Middle Dutch grommelen "murmur, mutter, grunt," from grommen "to rumble, growl." Imitative, or perhaps akin to grim. Related: Grumbled; grumbling.
1620s, from grumble (v.).