Best definition
A general exclamation, can be used to convey surprise, delight, pain, or simply to cover up awkward silences in conversation.

A socially acceptable version of exclamations such as shit, fuck, wow, crikey, pants. Demonstrates a level of coolness unknown to most mortals.

Person 1:(can’t think of anything to say)…that was Pants?

Person 2:(thinks)What a loser.

Person A:(can’t think of anything to say)… ‘Yaising!’

Person 2:(thinks) Wow, he’s cool.