being eccentric
eccentric behaviour or an eccentric characteristic
In the streets of London where beauty goes unregarded, eccentricity must pay the penalty, and it is better not to be very tall, to wear a long blue cloak, or to beat the air with your left hand — Virginia Woolf
a number that for a given conic section is the ratio of the distances from any point on the curve to the focus1 (fixed point) and the directrix (specified straight line)
deviation from a circular path
displacement from the geometrical centre