What does «cartuchón» mean in Spanish?

It is said of the one who pretends to ignore something he knows, of the one who pretends to be innocent.

♦ Used in: Chile
Whoever boasts a not very credible virginity, it is said especially about women.

♦ Used in: Bolivia - Chile
That it shows modesty; that it is puritanical, moralistic or retrograde.

♦ Used in: Chile

Examples of use in Spanish: "Ya actualízate, cartuchón; no le puedes presentar a la junta tus propuestas en rotafolios", Para insultar con propiedad: Diccionario de insultos, María del Pilar Montes de Oca - 2016
No sexual experience; virgin.

♦ Used in: Bolivia
Augmentative of cartridge; large cartridge.

Examples of use in Spanish: "Un compacto cartuchón de pólvora, confeccionado con el desguace de 94 cartuchos de escopeta", Crónicas de Gardel en Mercedes y otras historias, Dinova, Oscar Alberto - 2014