This term describes legal writing which may be cluttered, wordy, indirect, and may include unnecessary technical words or phrases. Historically, legalese is language a lawyer might use in drafting a contract or a pleading but would not use in ordinary conversation.
This term refers to writing in a legal context that can be verbose, convoluted, and filled with technical terms that are not commonly used in everyday speech.  Historically, lawyers might use this type of language when drafting contracts or legal documents but wouldn't typically employ it in casual conversation.