Drink

• Adam’s ale – water
• brew – a hot drink, usually tea
• corporation pop – water
• cow juice – milk
• Rosie Lee – rhyming slang for tea
• splosh – tea  

Food

• barmcake – a bread bun
• banger – a sausage
• brekky
• buttie/butty
• dockytime – morning break
• eating irons – cutlery
• elevenses – morning break
• gob spanners – cutlery
• grub
• jockey’s whips – rhyming slang for chips (French fries)
• nosh
• pig out
• sanger – sandwich
• sarnie – sandwich
• scoff
• scran
• slap up meal  

Places to eat and drink

• caff – cafe
  
• chinky – a Chinese takeaway (offensive)
  
• chippy – a chip shop (a fastfood establishment)
• greasy spoon 
• noshery