look up any word, like blumpkin:
 
1.
When you are not feeling well or hungover and sex would help.
She needs a shot of peniscillin.
by Amalia R October 24, 2006
 
2.
The cure for the common "Can't have sex now honey, I have a headache!" excuse.
Boy: I'm on my way, hope you'll be dressed sexy and ready for me when I get home.

Girl: Oh honey, I can't have sex tonight. I have the worst headache. I must be coming down with something.

Boy: Don't worry baby, I'll give you the proper dose of Peniscillin which cures everything!
by LeslieSharp December 26, 2010