Injection

[Britney]

The act of injecting or throwing in; -- applied
particularly to the forcible throwing in of a liquid, or aeriform body,
by means of a syringe, pump, etc.

[Jessica]

When you [get stabbed].

[Raeanne Dimick]

(noun) the depositing of [sperm] in the [vagina]
see also [squirting jam into a donut]

[Hina Muqadas]

An instance of injecting or being injected.