dude oneself up
To dress formally, perhaps more formally than usual. A reflexive pronoun can be used between "dude" and "up." You need to dude yourself up for this event tonight—a suit and tie would be appropriate. I duded up for the birthday party and was embarrassed to find the other guests in shorts and t-shirts.
dude (oneself) up
tv. to dress in fancy or stylish clothing. Why don’t you dude yourself up so we can go out tonight?