Does anyone know what "sic frangit crispidum" means (if it means anything at all)?

This does not appear to be genuine Latin, but I can offer a translation:

sic frangit means 'thus breaks', so the phrase means 'thus breaks the something'. But crispidum is not a proper word. Assuming it is an English word designed to look like a Latin one, it is 'crisp', which is the English word for a thin slice of fried potato (I can't remember what Americans call them). The phrase means 'thus breaks the crisp', or in a more colloquial wording, 'that's the way the cookie crumbles'.

According to http://mymemory.translated.net/en/Latin/English/sic-friatur-crustum-dulce the everyday latin translation is Sic friatur crustum dulce. Other sites have variations on Sic biscuitus disintegratum.