Nonsensical Restaurant Terms Explained

Ever heard a restaurant employee shouting about weeds or fire or all day and wondered just what the hell they were talking about? Turns out, they’re not actually hallucinating,* and the random phrases actually have specific, important meanings.

Source: Here’s What All Those Nonsensical Restaurant Terms Mean

When in doubt, urban dictionary has definitions for words, terms and acronyms.  But no history/etymology like the article.