Some people wrongly assume this is what you call heebie-jeebies, chills, or shivers up the spine, but this is not that sensation at all. Those names are associated with fear or anxiety.
Some might say it’s pins and needles. Pins and needles is a tingling sensation, but occurs when a limb is recovering from numbness, and may even be slightly painful and discomforting.
Tingles have been said by some to be as good as or even better than an orgasm. Some people even have both at the same time! Tingles can fade in and out, or can be a more constant feeling all over the cranium.
Another informal forum term referring to tingles is AIHO, or Attention Induced Head Orgasm, which I actually read in a forum thread. Some do not associate it with sex though, and might prefer others terms like AIE, or Attention Induced Euphoria. Others could be AIOEU, Attention Induced Observant Euphoria (notice how it incorporates all the vowels).
People are constantly thinking of new ones.