«قَاعِدْ لِلسَّاقْطَهْ وِاللَّاقْطَهْ»

The expression paints a person planted in place, alert to every remark that slips out and to whoever snatches it up. It mocks someone preoccupied with other people's affairs, keeping a running tally of their words and actions instead of attending to their own business.

The elliptical pairing of a 'dropped' thing and a 'catching' thing is commonly read as the talker and the listener, though that reading is interpretive, not literal. The target is a busybody fixated on the whole chain of chatter, implying idleness, nosiness, and readiness to hold slips against people.

Said disapprovingly about someone who seems to have nothing better to do than monitor others, noting who said what and who repeated it. As worded it describes a male subject; other subjects change the opening word. Suits casual complaint or gentle mockery.