British informal (In a racket game) practise before formal play begins.
More example sentences
- The idea came when they were knocking up one day last June on the grass courts at Roehampton.
- She knocks up with England's seventh seed Elena Baltacha and recently had the chance to play doubles with British number one Tim Henman when he visited the sports centre.
- The players are on court and are knocking up.
More definitions of knock upDefinition of knock up in:
- The English Synonyms