Although my older recipe books refer to light 'pre theatre suppers' ooop here we use the word to refer to the final late late night nibbles before bed

Wiki describes this as
"In parts of the United Kingdom, supper is a term for a snack eaten after the evening meal and before bed, usually consisting of a warm, milky drink and British biscuits or cereal"

However mine is more likely to be a glass of red wine tipple and a more savoury nibble:)