What is Elevenses?
1.
The name for a traditional English requirement for a hot beverage, usually tea or coffee and a light, sweet snack to go with it, usually biscuits. The urge arrives around 11am, hence the name, and is used to fill the gap between breakfast and lunch.
"I'm starting to feel a little peckish, is it time for elevenses yet?"
See
2.
Usually a snack from a vending machine enjoyed by someone who is too greedy to wait for lunch.
<person1: 10.45am> Do you have any snacks over there I can eat?
<person2: 10.46am> There's a vending machine over there for people who require elevenses.