Oof Baboof

a phrase - said typically by plumbers - akin to that of "Fuck" or "Damn", used when something is of surprise or disgust or almost any other emotion.

Client: Woah! You guys aren't the usual plumbers!
Plumber 1: Ohhhhhh. Mister brand loyalty over here
Client: Okay okay, follow me then.
Plumber 2: Finally, Oof Baboof with you two!