Meaning
A toy water gun, usually brightly coloured and ready to squirt. Most current designs show a toy, while older ones looked like a real handgun, so the meaning has shifted over time.
Today it is used for water fights, summer fun and playful threats: “Pool party Sunday 🔫 come prepared to get wet.” It also appears in finger-gun jokes, but avoid it in tense or serious conversations where it could be misread.