Nasty cum or sperm that is ejaculated from a bum, a bum that is nasty and lives in the woods usually. the cum may be brown or yellow, if your unlucky it may be bloody and white. bum cum is not something to mess with, its so sticky and powerful it could stick you to a tree if a bum attacks with his cum.
"guess what happened to john out in the graveyard woods?"
"what?"
"some bums attacked him and ejected their bum-cum all over him."
The empty car on a packed rush hour NYC subway train that is empty for a reason: the sweet smell of impacted fecal matter sitting in urine-drenched unwashed clothes with sweet ripe cheesy feet of the homeless person sitting in the corner.