pitch up

pitch up (third-person singular simple present pitches up, present participle pitching up, simple past and past participle pitched up)

1. To arrive; to turn up.
   • 2011, "David Cameron outlines foreign policy philosophy – but don't call it a doctrine", Wintour and Watt Blog, The Guardian:

     David Cameron pitched up in New York at lunchtime on Wednesday for the annual meeting of the United Nations General Assembly less than a week after an ecstatic reception on the streets of Tripoli and Benghazi.

   • 2013, "How UKIP became a British political force", BBC:

     It has realised the hard way that it is not enough just to pitch up at a by-election with a loud hailer and some media-friendly stunts, it requires months, even years, of groundwork in the local area.

2. (transitive) To raise the pitch of (a sound).