tik

/T IY1 K/
noun
  1. 1

    Crystal meth or speed.

    โ€œ"Over a third of all people seeking rehabilitation in the second half of 2005 reported that their primary problem was tik". Weekend Argus 13/14 May 2006 p.12.โ€

Source: https://en.wiktionary.org/wiki/tik