"informer," 1785, probably from underworld slang meaning "the nose" (1700), which apparently developed from an earlier meaning "fillip on the nose" (1670s). Snitcher in same sense is from 1827.
snitch (v.)
1803, "to inform," from snitch (n.). Meaning "to steal, pilfer" is attested from 1904, perhaps a variant of snatch (v.). Related: Snitched; snitching.
snitch 双语例句
1. I managed to snitch abdul abdullah's breakfast.
我想办法把阿布·阿度拉偷到手.
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2. Lieutenant Colonel Frank Slade: But not a 6 snitch.
弗兰克?斯莱德上校: 但不是一个告密者.
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3. At the last moment, Harry caught the Snitch for 150 points.