What's the difference between i.e. and e.g.?
Barely enough space for the occupant; a minimum of space: This office is so crowded I couldn't find elbow room for anyone else/ Don't crowd so, give me elbow room
[1700s+; propagated in the US because it was a nickname for General John Burgoyne, who boasted in the 1770s that he would find elbow room in this country]