Noun

1. A container for transporting meals, especially lunch.
2. A person or object constantly at one's side (in the manner of a lunchbox).
3. (British slang) The male genitals when enclosed in clothing.

Synonyms

• (container for transporting meals): lunch pail (US), bento box
• (person constantly at one's side): sidekick
• (thing constantly at one's side):
• (male genitals enclosed in clothing): basket (US), packet