Lewis & Short

spūmo, āvi, ātum, 1, v. n. and a. [spuma].

  1. I. Neutr., to foam, froth (poet. and in post-Aug. prose): caeruleum spumat sale, Enn. ap. Gell. 2, 26 (Ann. v. 378 Vahl.): maria salsa spumant sanguine, id. Non. 183, 19 (Trag. v. 145 ib.): fluctu spumabant caerula cano, Verg. A. 8, 672: adductis spumant freta versa lacertis, id. ib. 5, 141; cf. Lucr. 3, 493: spumans aper, Verg. A. 4, 158; Claud. Rapt. Pros. 2, 243: Amasenus spumabat, Verg. A. 11, 548: equus spumat habenis, Luc. 6, 399: pocula bina novo spumantia lacte, Verg. E. 5, 67: patera, id. A. 1, 739; cf.: spumat plenis vindemia labris, id. G. 2, 6: spumans bilis, Cels. 7, 23; Plin. 32, 7, 25, § 78: terra respersa aceto spumat, foams up, boils up, effervesces, Cels. 5, 27, 4: frena spumantia, covered with foam, Verg. A. 4, 135; 5, 817: mella, id. G. 4, 140: sanguis, id. A. 9, 456.
    Of an angry person: spumantibus ardens visceribus, Juv. 13, 14.
  2. II. Act., to cause to foam, to foam forth, cover with foam (very rare).
    1. * A. Lit.: saxa salis niveo spumata liquore, Cic. Poët. Div. 1, 7, 13.
    2. B. Trop.: ex ore scelus, Auct. Her. 4, 55, 68; Claud. Rapt. Pros. 1, 282.