Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
1. mandūco, āvi, ātum (in the dep. form, mandūcor, ari, Lucil., Afran., and Pompon. ap. Non. 477, 8 sq. (Pomp. Com. Rel. v. 100 Rib.; Afran. ib. v. 184); cf. Prisc. 799 P.), 1, v. a. [a lengthened form of 2 mando].
2. mandūco, ōnis, m. [1. manduco], a glutton, gormandizer (post-class.), Pompon. ap. Non. 17, 15 (Com. Rel. v. 112 Rib.); App. M. 6, p. 186, 41.