Blaccidents come from unknowing use of the camera on a phone, for instance while the phone's in your pocket you take pictures by mistake, burying the real picture you took and want to find under a pile of all-black mistake pictures, or blaccidents.
Unlike butt dials, blaccidents can accumulate up to the hundreds without anyone being able to warn against what you are doing.
Oh crap, you have to see this awesome thing, here look!! -- oh wait, no that one's just a blaccident. Oh no, so is this one!!! Where is that picture!!
a stupid or ignorantly foolish person, usually male, possessing an appendage that hangs limply, especially so as to look or feel unpleasant, (e.g.: a limp dick)
Causing your sexual arousal or physical attraction to dissipate (the sexual analogue to buzzkill or downer.) Literal meaning is "causing to become flaccid", but can also be used more generally to indicate loss of interest.
I was so turned on seeing that hot guy walk in, but his racist comments were totally flaccidating.
Yeah, she was sexy AF but her breath was majorly flaccidating.