marker
n.— «That’s a good thing, too, as high-end guns, or “markers” in paintball parlance, can fire a projectile up to 300 feet per second.» —“Fort Dodge-based paintball team is ‘all about safety'” by Jesse Helling Messenger (Fort Dodge, Iowa) Feb. 17, 2007. (source: Double-Tongued Dictionary)
Further reading
Have you ever googled your own name and found someone else who goes by the very same moniker? There’s a word for that: googleganger. Plus, the language of hobbyists and enthusiasts: If you’re a beekeeper, perhaps you call yourself a...
Skip, a sailing enthusiast from Gainesville, Florida, has been pondering radio protocols, such as the distress signal mayday!, and sécurité, which announces any of various warnings. There’s also pan-pan, repeated three times, a call that...