Ack! I totally misread the thread title as "similes," and was prepared to read a collection of things like "h*rnier than a Vulcan in pon farr.
To go on a bit of a tangent, in my family we actually DO use a lot of Star Trek expressions, like, "Hot as Vulcan" (McCoy, in the episode "Amok Time") or, "More vicious than a Klingon!" or, "Geez, with that greed they could be Ferengi!". We'll look at landscapes and say, "Wow, that looks like Bajor/Betazed/Quo'nos!" Sadly, most people I say it to who are not Star Trek fans don't know what I'm talking about - but on the plus side, they assume Bajor or Betazed is some fancy holiday destination!