What is Sh?
1.
"So high". The abbreviation is useful when one is in public places and wants to tell their friends about their level of intoxication, but would prefer if strangers and/or authority figures did not know. Extra S's before the H indicate that one is higher than usual.
"Hey Ariel, your eyes are kind of bloodshot"
"I'm SH".
"Let's get SH and watch Across the Universe. Good party!"
See
2.
"sh" is a UNIX command shell. Currently superceded by BASH. "sh" ("shell") is the original.
#!/bin/sh