lun yeung

Cantonese slang, "lun" refers to penis, "yeung" refers to face. thus, "lun" + "yeung" = penis-face

equivalent in measure with the American term of calling someone an "asshole"

Colman: How was your take home physics exam?
Jeff:Dave that "lun yeung" messed up the calculations.

by The Diuler October 1, 2007