Feefifofum

(verb.) to enter an area or situation loudly, boisterously, or with a dramatic interruption, immediately drawing attention.
(noun.) someone who feefifofums or who behaves similarly to such a person.
(noun.) a verb whose own utterance accomplishes itself.

I shoved the door open, shouting soon thereafter, "Feefifofum!" thereby feefifofumming.
Her sudden feefifofumming disrupted our conversation.
He is such a feefifofum!