[kolp]

Gobshite, while it might appear to be "mouth shitter", isn't used to describe a braggard bullshitter or liar, as the components might suggest. It's more commonly used to describe a person who's both stupidly incompetent and contemptible, as in:

"Why is the system down?"

"Dave pushed the updates to the production server again."

"F*king gobshite."

Gobdaw is a less offensive variation, typically used by those who say fe_k instead of fu_k.