Borrowed from Yiddish שׂכל (seykhl, “wit, sense”), from Hebrew שֵׂכֶל (sekhel, “intelligence”).
seichel (uncountable)
- (Jewish slang) wit, sense, gumption
2001 January 11, David Goldman, “JEWS FORBIDDEN ON TEMPLE MOUNT”, in soc.culture.jewish[1] (Usenet):WHICH IS PRECISELY WHAT I SAID, IF YOU HAD HAD THE SECHEL TO UNDERSTAND.