The expression "square" comes from an older expression, "square peg in a round hole". The word "square" was originally used on it's own starting in the Jazz age of the 1920s. A person who was not a "hip or cool cat" was often described as a "square", a person who did not fit into the groove man.
The word "square" in the same context as above, carried on into the WW2 period and beyond into the Rock n Roll era and was used frequently in the 1950s.
In the link below, Elvis sings Jail House Rock, in which the King sings the line - "Hey, buddy, don't you be no square. ...
YouTube Music Videos 60s 70s - Elvis Presley - Jailhouse Rock - Blogs - Noolmusic.com.
http://www.noolmusic.com/blogs/YouTube_Music_Videos_60s_70s_-_Elvis_Presley_-_Jailhouse_Ro... - Cached
You need to watch Elvis carefully in this his best ever Rock n Roll rendition of Jail House Rock. The King never took a dancing lesson in his life. He is an absolute natural. You can see why he was often called, "Elvis the Pelvis".
Wrinkly Rocker...Rock on kid....
· 1 decade ago