The person that involuntarily and unknowingly messes up the smallest and the biggest things in life. Forgetfullness is a big part of an "ahaparos" person. It is also the person who left to his/her own devices can bring total and utter chaos to his/her surrounding universe.
n.
inability, or a facade thereof, to talk about, understand, or feel one's emotions; sometimes results in a real or manufactured inability to understand others
comes from the Greek roots a + hapto + thymos
(without + touch + emotions)