sig
A signature, especially one on emails or newsgroup postings.
Other meanings
Sigma (in the names of Greek-letter organizations).
“Sig Chi; Kappa Sig; Sig Nu”
Short for sigma in phrases like "what the sigma"
“What the sig is this?”
Where this comes from
This definition is adapted from “sig” on Wiktionary, by its contributors, published under CC BY-SA 4.0. This page is published under the same licence.