1. to hiccup (American)
2. to sneeze (dialect)
an exclamation of contempt ... begone, away with you, go and be hanged
also SNECK-UP, SNICCUP
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noun 1: ? from snick (vb.) 'go hang'
noun 2, 3: imitative;
also see First Documented Use below
1623 - (for noun 1) The Praise of Hemp-Seed, John Taylor;
see below From: A Glossary; Or, Collection of Words, Phrases, Names, and Allusions, etc., Robert Nares
Volume II. A New Edition, 1867
From: Notes and Queries
A Medium of Intercommunication for Literary Men, General Readers, etc.
Fifth Series - Volume Twelfth. July-December, 1879