sniggler (n.)youdaoicibaDictYouDict[sniggler 词源字典]
1840, in reference to fishing (especially for eels), agent noun from sniggle (v.) attested in this sense from 1670s, with verbal suffix -le + snig "an eel" (late 15c.), of obscure origin, but perhaps related to snake (n.), sneak (v.).[sniggler etymology, sniggler origin, 英语词源]