English

Verb

swack up ‎(third-person singular simple present swacks up, present participle swacking up, simple past and past participle swacked up)

1. (dated, Britain, public school slang) To lie; to deceive; to take in.

Synonyms

• See also Wikisaurus:deceive

References

• Farmer, John Stephen (1900) The Public School Word-Book, London: Hirshfeld Brothers, page 240
• Eric Partridge, A Dictionary of Slang and Unconventional English, 8th edition, 1984