g-argh-bbledygook!

gobbledygook: nonsense; meaningless or encrypted language.

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

g-argh-bbledygook!: what a pirate says to express annoyance, dismay, embarrassment or frustration about gobbledygooks.

"g-argh-bbledygook!" - says a pirate