... Not!
Postfix Not! is a linguistic construction in the English language by which a declarative statement is made, followed by a pause and then an emphatic "Not!" The result is a negation of the original declarative statement. Popularized in North America in the 1990s by the SNL skit and subsequent movie "Wayne's World," it can be found earliest in print in 1893 Princeton Tiger (Mar. 30) 103: An Historical Parallel-- Not. Note that the use of a postfix "not" has been used in English since at least the time of Shakespeare, what is more recent is the addition of the pause between the original statement and the "not."
Another example is an e. e. cummings poem which begins:
pity this busy monster manunkind
not.