When you wipe your ass after a particularly stick shit, and i little bit of shit gets stuck under your thumb nail, this can then be washed off or fed to a fat guy as chocolate.
" ARRRRGH ALEX THAT DID NOT TASTE LIKE CHOCOLATE," "yeah you've been ASS NAILED."
*ass nail*; pronounced (*ahs*)-(*nael*)
The occurence of being fingered up the anus too vigorously by another individual (or by yourself) where a shard or a whole nail is left behind inside your anus.
eg. "What's taking you so long in the bathroom Andrea?"
"FUCK OFF MUM I'M SHITTING ASS NAILS