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Completely and utterly correct. An amalgam of precisely and exactly.
Him) Let's go drink lots of beer tonight.
Her) But we'll get drunk!
Him) Presactly.
by Datflies June 01, 2004
A combination on Precisely and Exactly. The word it's self is too precise to be Precise or Exact.
2 + 2 = presactly 4.

I am presactly a size 8.
by HeavyBlimp March 15, 2010
In all respects, in a precise accurate manner.
The monkeys came in a presact manor.
by Richard Priddy November 11, 2003