tref
Not ritually clean
Tref is the Yiddish term for food that is not kosher—forbidden under Jewish dietary law.
Pork and shellfish are tref.
Meat and dairy served together is tref.
The word extends to anything ritually unfit or, more loosely, anything unclean or objectionable: The whole deal felt tref to me.
Also spelled treif or treyf.
unkosher
Forbidden by dietary laws
prohibited · impure · dietary · shellfish · pork · mixing · meat · dairy · rabbinical · halacha
worthless
Lacking any value
crummy · junky · shoddy · substandard · rubbish · garbage · useless · cheap · defective · second-rate
Jewish dietary law compliance
trefkosher
Permissible by Jewish law
pareve · clean · legitimate · proper · acceptable