noun

• (UK, Australia, New Zealand, slang) A round of drinks in a pub; the turn to pay the shot or scot; an act of paying for a round of drinks.
  "“I′ll get my wine though,” taking out her wallet. “No. This is my shout,” holding up his hand as though to ward her money off."
• (UK, Australia, slang) A call-out for an emergency services team.
  "Yet another ambulance on a shout enters Parliament Square."
• (informal) A greeting, name-check or other mention, for example on a radio or TV program.
  "Next up the new single from Beyoncé, but first a shout to Barry Bloggins and his wife Belinda..."
• (informal) A suggestion; an idea.
  "Yeah, good shout. We might get an idea of what we're up against before we park up and do business."

verb

• (intransitive) To utter a sudden and loud cry, as in joy, triumph, exultation or anger, or to attract attention, to animate others, etc.
  "Mom shouted to us to come sit at the table."
• (transitive) To utter with a shout; to cry; to shout out
  "They shouted his name to get his attention."
• (intransitive, figuratively) To forcefully attract attention or proclaim one’s presence.
  "We walk’d together on the crown Of a high mountain which look’d down Afar from its proud natural towers Of rock and forest, on the hills— The dwindled hills! begirt with bowers And shouting with a thousand rills."
• (Australia, New Zealand, slang) To pay for food, drink or entertainment for others.
  "After shouting me a plate of noodles and limp vegetables, he helped me change money by introducing me to the stallholder who offered the best exchange rates."

noun

• (UK, dialect) A flat-bottomed boat, a barge (for carrying cargo, etc), now especially a light boat used in duck-shooting.
  "Although the density of the flour in particular would be less than that of the wheat, an equivalent 200 quarters of wheat per shout would not seem out of the question here. Again using Table 4, this suggests quite large boats carrying nearly 35 tons. If the 'Blackfriars 3' shout did indeed carry only 7.5 tons, then the shouts coming from Henley in 1345 were considerably bigger vessels, […]"