"Do you guys know what 'duende' means? It's what the flamenco call soul. It's the real thing inside us that can't be faked."

... 

"I've lost my duende and there's no way to get it back."

(Gary in "Lodge 49")

... I've lost my duende... and I don't know how to get it back. 

(S.F. und ihre Hormongeschichten)