(Latin) Literally, "the speaker has no penis." In rhetoric, an unanswerable comeback to a nominally male opponent who believes in the magical powers of the so-called "logical fallacies" to replace the missing member and thereby to "win" an "argument."
A: Sometimes I wonder if Shakira really is as good as people say she is.
B (triumphantly): Argumentum ad populum!
A: Well met, good sir. However: Orator non penum.
Audience: (Raucous laughter).
A has won the argument.
B (triumphantly): Argumentum ad populum!
A: Well met, good sir. However: Orator non penum.
Audience: (Raucous laughter).
A has won the argument.
by Pliny April 29, 2014