sillyfossical
When a person in attempting to convey a deep and meaningful idea ends up looking ridiculously silly in doing so. Many times this is because the individual does not know what they're talking about and are simply making up gibberish. Other times the individual's philosophy may not fit the preconceived image others have of them, causing difficulty in the comprehension of onlookers, being then dismissed as silly.
It was hard to take the cute mechanic serious when she got all sillyfossical.