Lewis & Short

ef-fūtĭo, no

  1. I. perf., ītum, 4, v. a. [FVTIO, acc. to Prisc. p. 631 P.], to blab out, babble forth, to prate, chatter, utter (class.): multa ore, Lucr. 5, 910; so, aliquid, Cic. N. D. 1, 30, 84; * Hor. A. P. 231; Gell. 5, 1; cf.: effutita temere (vaticinia), Cic. Div. 2, 55, 113: de mundo, id. N. D. 2, 37, 94.
  2. II. Absol.
          1. (α) To blab, tell secrets: eo perperam olim dixi, ne vos foris effutiretis; and absol., Ter. Ph. 5, 1, 19.
          2. (β) To talk idly: ex tempore, Cic. Tusc. 5, 31, 88.