Payste

v.

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To vigorously slap or otherwise physically rebuke someone.

In use

Shurrup or I'll payste ya in de bollix ye bollix!

Let Lawrence Muck translate it to posh English for you
Lawrence Muck

Ah, a guest of distinction! Would you like me to translate 'Payste' in use for you?

Silence, or I shall strike you in the testicles, you scoundrel!