(n.) a term used to describe a gentile, or non-Jew, who engages in intercourse with a Jew one or more times, thereby, becoming somewhat of an honorary Jew of sorts.

"Have you met my new girlfriend?"

"No. She's hot. Is she Jewish?"

"She is now, man. Jewish by injection!"

"Right on!"

by JAP_ December 30, 2008
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When you slide that nasty sausage in a bun and squirt some ketchup in it.
Penis injections are fun,
I love penis injections
by NIKKEN September 7, 2021
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An exclamation accompanied by an index finger to upper-arm gesture that is quickly self-administered at the first sign of girl or boy "germs". Particularly popular with Australian schoolchildren throughout the 1990s.

Ironically, the injection for life never actually lasted for life, as it was said at every possible opportunity, if not several times a school day.
Jess: Ooh, David just borrowed my eraser and I think I saw him pick his nose earlier!

Stacey, Christine and Sharon: Injection for life!!
by Ginadean February 14, 2009
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Tanning injections refer to the injection of one of the melanotan peptides (melanotan-1 and melanotan II) to develop pigmentation in one's skin thus allowing individuals who ordinarily cannot tan or have difficulty doing so (fitzpatrick skin type I and type II, ie: redheads and gingers) to be able to do so. See: Melanotan.org
United Kingdom Jordan's (Katie Price) boyfriend was amazingly tanned from having used tanning injections.
by melanotan September 23, 2009
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A web hacking technique which invloves submitting information to a web script which uses SQL databases (for instance a username/password checking script) which modifies the code of the script to gain unauthorized access to anything from databases to server commands.
That website was too easy to gain admin access to. All I had to do was use SQL injection in the admin login script.
by Powersurge December 13, 2004
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A term used to describe intercourse, in which the mans "beef" is "injected" into said person's orifice.
A beef injection a day keeps the doctor away!
by [leah] November 30, 2007
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