(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!
Fogey/fogy /fougi/ sl. (early 18C+, orig. Scot) old-fashioned, stuck-in-the mud.
Person with old fashioned ideas which he is unwilling to change: Come to the disco and stop being such an old fogey!
You think me an old fogeyand an old tory, his thoughtful voice said. I saw three generations since O’Connel’s time. I remember the famine. Do you know that the orange lodges agitated for repeal of the union twenty years before O’Connel did or before the prelates of your communion denounced him as a demagogue? You fenians forget some things. (James Joyce, Ulysses. Penguin Books,1992. p. 38)