(v.) Repeatedly sending inane websites dozens or hundreds of times, often in conjunction with accompliaces, to a StumbleUpon user so that it becomes all but impossible for him to surf the sites he wants to.
It took me two hours to get through those pages after those dudes stumblebombed me.
the red, prickly, swollen nodule found on the surface of one's scalp. stubblebumps can be spotted in anime shows; however, they exist in real life, but are often concealed under snug-fitting tophats.
Wendell had to duck at the threshold to prevent from bashing his stubblebump against the doorframe.