‘Ying’ is slang for a knife (‘yingers’ or ‘yings’ refers to multiple knives). ‘Ying’ is also used to mean ‘stab’. ‘Yinged’ is slang for ‘stabbed’. Probably only used in London gangs context given its usage in UK drill music.
The word "yingele" is yiddish for "boy". However, it is believed that it derived from the middle high german word "junge" meaning "youngster", "boy" or even "young girl" during its use from 1050 to 1350. Ashkenazic Jews are credited with creating this Judeo-German language. Almost all of its vocabulary is derived from middle high german, with the exception of words used for religious purposes.