Correct spelling for the English word "squir" is [skwˈɜː], [skwˈɜː], [s_k_w_ˈɜː] (IPA phonetic alphabet).
"Squir" is not a recognized word in the English language. It is possible that the term you are referring to is a truncation or an abbreviation of a longer word. Without additional context or information, it is challenging to accurately define it. It would be helpful to provide more details or the full word so that an appropriate definition can be given.