Best definition
the technical way of saying WEIRD. doing weird stuff, such as putting dogs on head, posing like :O style

one night S.S.S was posing with a dog on her head and it was weirdism,
weirdism: define #2
habits, fears, or acts foreign to others but essential to you
My fear of walking up a ladder is one of my weirdisms.
weirdism: define #3
a quality showing how weird or ignorant you are
as in “If you have weirdisms you must be a dumbass”