packer

noun

1. A person whose business is to pack things; especially, one who packs food for preservation“He works as a pork packer.”
2. A software program that compresses code or data.
3. A ring of packing or a special device to render gastight and watertight the space between the tubing and bore of an oil well.
4. An artificial penis or similar object worn by a drag king, trans man, etc., inside the trousers.