schnorrer (n.)

"A scrounger, a vagabond," was first recorded in 1892 by Zangwill. It was originally used to describe a Jewish beggar, the word was adapted from Yiddish, meaning "beggar," which derived from German slang word schnurrer. The German slang word schnurrer was created from the word schnurren , meaning "to go begging" (slang). The word schnurren perhaps originated from the imitation of the sound of pleading or whining (compare with sneer , snorkel, snarl).