1. (noun)tamp, tamper, tamping bar a tool for tamping (e.g., for tamping tobacco into a pipe bowl or a charge into a drill hole etc.)
2. (verb)tamper, fiddle, monkey play around with or alter or falsify, usually secretively or dishonestly
"Someone tampered with the documents on my desk"; "The reporter fiddle with the facts"
3. (verb)meddle, tamper intrude in other people's affairs or business; interfere unwantedly
"Don't meddle in my affairs!"