sig

Short definition from Wiktionary

Noun

1. 1
   A signature, especially one on emails or newsgroup postings.
2. 2
   Sigma (in the names of Greek-letter organizations).
3. 3
   Urine.
4. 4
   Initialism of special interest group.

Verb

1. 1
   To good-naturedly make fun of someone; to signify.

Proper noun

1. 1
   A male given name from German Siegfried