teka-teka
A slick, shiny surface caused by oil or grease. Often describes an oily face, polished leather, or overly shiny fabric with a slightly negative nuance.
💡Noticing someone's forehead after a long day — 'Your face is all teka-teka, maybe blot it with a tissue.'
彼の顔は汗でてかてか光っていた。
His face was shining teka-teka with sweat.
After eating fried chicken, his fingers were ___ with grease.
唐揚げを食べた後、彼の指は油で○○していた。