gibbARGHishes!

gibberish: speech or writing that is unintelligible, incoherent or meaningless.

argh: what a pirate says to express annoyance, dismay, embarrassment or frustration.

gibbARGHishes!: what a pirate says to express annoyance, dismay, embarrassment or frustration about gibberishes.

"gibbARGHishes!" - says a pirate