If you really want to annoy someone, keep saying ‘nerp’, for no reason.
And I don’t mean only say, ‘nerp’. I mean, toss it in randomly.
‘What was the name of that website I was on earlier?’
‘Was it nerp?’
Then in the silences to follow, say, ‘was it nerp?’ a few more times.
Also, really emphasize ‘nerp’, make it sing. They’ll hate you. I guarantee it.