A person who 'scrapes' into a conversation and then, through poor communication skills and bad jokes, completely kills the conversation. They splunge it.
ashleigh- my dog threw up yesterday
connor- yeah my dog ate the sick
kiera- i have a cat.
ashleigh- kiera, scrape out.
connor- omg kiera is such a Splunger.
Originating from a Monty python, splunge is a way of saying that you have no worthy opinion and that an idea could or could not be good. It could also be a quick comeback if you do not have an answer for a question.
Boss: I don't want a yes man and don't disagree!!! Now what do you think about my business plan.