"He does luftgescheft since he does art for work."

"The bus he drives is luftgescheft; it runs on air."

"From an ideological perspective, rural productive life was glorified, while the urban luftgescheft (a derogatory Yiddish designation for ‘non-productive’ livelihoods, such as commerce) was constantly criticized." (Of Other Cinematic Spaces: Urban Zionism in Early Hebrew Cinema by Hizky Shoham)