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4.
A spelling, based on mispronunciation common in Eastern Kentucky, of the drug oxycontin.
I hid a bottle of oxytocin in the ceiling when the cops pulled up.
by Hillboy July 20, 2006
 
1.
It is NOT a misspelling of oxycotin, but instead a hormone that simultaneously acts as a neurotransmitter. It is released during orgasm in both sexes and is associated with feelings of love or attachment after sexual acts.
Love is oxytocin.

Girl: I love you!
Boy: That is just oxytocin talking...
by Kate Sims September 20, 2007
 
2.
Oxytocin
aka the "cuddle hormone"

It is an organic compound belonging to the carboxylic acid
functional group.
It also happens to be a hormone & neurotransmitter

Oxytocin is released during orgasm, social recognition
(i.e. making friends), bonding (when you start to fancy
that guy/girl you've been chatting with for the last God
knows how long), anxiety and a number of other relating
events.
This is where it gets its cuddle hormone nickname from.

It plays a large part in female reproduction where it
is released in large quantities during childbirth and
breastfeeding

It is also rumoured that eating dark chocolate slowly
can cause its release.
This may be why dark chocolate is considered an
aphrodisiac.
Oxytocin and it's many wonders:

Girl 1: I just ate some dark chocolate really slowly n had the most amazing orgasm!

Girl 2: looks like we don't need men any more LOL
by rzhhhh July 05, 2010
 
3.
A neurotransmitter released in the brain after one reaches an orgasm. It may cause feelings of closeness. Some refer to it as the cuddle hormone.
It was amaaaaazing, but when it was over I wanted to cuddle and he wanted to go. I guess his oxytocin levels aren't that high...
by Ohh Just Fuck It June 21, 2011