The term was coined by humorist Paul Jennings in a piece titled "Report on Resistentialism", published in The Spectator in 1948 and reprinted in The New York Times.
The slogan of Resistentialism is "Les choses sont contre nous" -- "Things are against us"
Missing car keys: they have moved of their own accord and by means quite unobservable in order to spite you... Resistentialism!
When a bouncy ball escapes down the road: it may seem innocent but the ball knows all too well that the centre of the spectacle is that poor chap grasping helplessly in its wake... Resistentialism!
Be on the watch my fellow humans!
"Christ, the dumb insolence of inanimate objects! He could never understand what was 'in it' for inanimate objects, behaving as they did. What was 'in it' for the doorknob that hooked your jacket as you passed? What was 'in it' for the jacket pocket?" --Martin Amis, "The Information