Characters
Anyone who wants to be a can't-hack-it pantywaist who wears their mama's bra, raise your hand.
— Benny ‧ The Sandlot

Behind the line May contain spoilers.
Our reading
An editorial interpretation.
The invitation asks people to identify themselves with a string of insults. Raising a hand would therefore accept the description as well as answer the request. The wording uses humiliation as pressure, while the excerpt gives no response and does not establish that anyone actually complies.
Context reviewed