When you completely shut down someone who has no clue of what they are talking about. It is derived from the nickname of the currentpresident of Botswana who gave a very good speech about the recently lifted elephant hunting ban in the country.
(verb)
1.) To do something in the spirit of a Jill
2.) Adding craziness to a situation that was previously considered normal
3.) Making irrelevant outbursts at random times that make conversations awkward and/or uncomfortable
Matt and Rachel were having a relaxingdinner, before it got Jillified and no one knew what to say.