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2.
1. A vulgar expression to depict the action of thrusting the penis into the vagina. Mainly used in the company of "Lads"; this phrase carries an air of Bravado about it.

2. Can also be used when describing a young lady who might not be up to ones usual standards aesthetically but would be adequate for the purposes of short-term sexual gratification.

3. Used in a jocular manner when performing everyday tasks. By simply emphasising the words, a very humorous effect can be achieved. ie When inserting a floppy disk into a computer.
"Stick it in, Derek!"
"I'd stick it in!"
"Have you been sticking it in?"
"You didn't stick it in did you?"
"Just take this disk and STICK IT IN!"

Derek
Lad
by Joseph Jones October 13, 2005
 
1.
Putting your penis (deeeeik) in a vagina. Having sex.
Yeah mayn, stick it in
you stick it in her vag yet?
by stttttt October 11, 2007
 
3.
stick the penis in vegina
Im gonna stick it in now.
by KawaiiAnime October 27, 2003