1) An insult, similar to "fuck you" or "you suck"; 2) a phrase used to describe when things are less than optimal, similar to "this sucks"; 3) to receive an erect penis into a body orifice.
Committing suicide by inhaling methane gas from heating pipes or ovens. A more common suicide method in the earlier 20th century. Also used as a way to tell somebody off.
Aunt Angie was so depressed when she found out about Uncle Charlie cheating on her that she took the gas pipe.
You're really getting on my nerves. Why don't you go take the gas pipe?