A specialized form of informal English used by tradespeople among themselves is?

The specialized form of informal English used by tradespeople among themselves is often called "shop talk" or "trade jargon."

Here's why:

* Shop talk: This term refers to the casual conversation that happens within a particular profession or trade. It often involves using specialized vocabulary and slang that only people in that field understand.

* Trade jargon: This term specifically refers to the unique vocabulary and slang used by a particular trade. It can include technical terms, abbreviations, and slang phrases that are specific to the work they do.

Examples of trade jargon:

* Electricians: "hot" (meaning live wire), "ground fault"

* Plumbers: "saddle valve," "sweat joint"

* Carpenters: "framing lumber," "rough opening"

* Construction workers: "backfill," "rebar"

Characteristics of trade jargon:

* Efficiency: Trade jargon can be a shorthand way to communicate complex ideas quickly.

* Intimacy: It can create a sense of camaraderie and shared understanding among members of the trade.

* Exclusionary: It can sometimes be difficult for outsiders to understand, creating a barrier between tradespeople and the general public.

So, while it might not have a single, universally accepted term, "shop talk" and "trade jargon" are the most common ways to refer to the specialized informal English used by tradespeople.