Large, round, transparent or tinted glasses. Usually of the non-prescription variant. Used by amateurs and/or professional entertainers in the porn industry. Used mainly to prevent a cum shot to the eye/s
shortly after performing fellatio. Cum Shields have also proven themselves to be quite useful in today's bukkake scenes. Usually accompanied by a large goblet or chalice. Most commonly made of glass, and held under the chin to collect any run down of semen.
Example: "Bro did you check out that sick POV blowjob that was just releasedthe other day? She can really rock those Cum Shields!!!"