noun

• (marketing, figurative) Ellipsis of purchase funnel (“the process of customer acquisition conceptualized as a series of stages, from initial awareness (top) to sale or conversion (bottom)”).
  "top of (the) funnel marketing"
• (meteorology) Ellipsis of funnel cloud.

verb

• (transitive) To use a funnel.
• (intransitive) To proceed through a narrow gap or passageway akin to a funnel; to condense or narrow.
  "Expect delays where the traffic funnels down to one lane."
• (transitive) To channel, direct, or focus (emotions, money, resources, etc.).
  "Our taxes are being funnelled into pointless government initiatives."
• (transitive) To consume (beer, etc.) rapidly through a funnel, typically as a stunt at a party.
  "The first time he did it was to this freshman Kevin Ryers and we all just burst out laughing, watching Kevin try to funnel a beer."