strut in
To walk in(to some place) in a vain, swaggering, or pompous manner. You'd swear Tom was running the whole company from the way he strutted in the office after his promotion. Janet strutted in sporting Gucci sunglasses and a new Louis Vuitton bag.
strut in (to some place)
to stride pompously into a place. He strutted into the house as if he owned the place. Betty strutted in and sat down.