packer
For sale at adult novelty stores or online; a life-like fake penis with testicles used to "pack" into the underwear of females or the penis-less who want to give the impression of having a penis. Female to male transitionals, butch lesbians or guys just wanting to seem like they have a bigger penis can use them.
Descriptions of packers from a couple of online stores:

Mr. Softy: Super soft and great for everyday packing! A perfect size to fit under any pair of pants or jeans. We recommend a tight pair of briefs to keep it in place, and a little corstarch to keep it soft after cleaning. Made of cyberskin.

Soft Pack:
This family of packers is built to bulge. The realistic package feels amazing through jeans and has even been known to pass the "squeeze test" at gay men's clubs. It has a "realistic" texture as well as form, and successfully mimics a flaccid penis. Available in Vanilla, Mocha, Chocolate, and Blue colors and in mini, small, medium and large sizes. Not usable for penetration. Made of phthalate-free Reel Feel Super Skin. Mini: 3-1/2"; Small: 4-1/2"; Medium: 5-3/4"; Large: 7".
