Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
Sampsĭcĕrămus, i, m., a humorous designation of Pompey in Cicero’s letters (after a petty king of Emesa conquered by him), Cic. Att. 2, 14, 1; 2, 16, 2; 2, 17, 2.