What is "blabera gigantea"

knocker \knock"er\, n.

1. One who, or that which, knocks; specifically, an instrument, or kind of hammer, fastened to a door, to be used in seeking for admittance.

   Shut, shut the door, good John ! fatigued, I said; Tie up the knocker; say I'm sick, I'm dead.
   --Pope.

2. A person strikingly handsome, beautiful, or fine; one who wins admiration; a ``stunner.'' [Slang.]

3. A species of large cockroach, especially Blabera gigantea, of semitropical America, which is able to produce a loud knocking sound.

4. [usually used in pl.] a woman's breast. [vulgar]