Ver ser (verb), un (article), and, well, 'chapas' can be a colloquial localism for chapero ("young male who works in prostitution"), latoso ("dense, boring, heavy-minded person"), and surely some more.
In Spain, "to be a chapas" is to be a heavy, just as "to give the plate" is to give the murga, to annoy excessively.
In Argentina is using this expression by the jargon youth to give to understand that is a person crazy or crazy and perhaps eccentric.
be a veneer is incorrectly written and it should be written as "being on a sheet. Scort."being its meaning: Said is of who were prostitutes, as man, for other men of the same sexo.2. Also called scort.