look up any word, like eiffel tower:
 
1.
"Ignition" is, among other things, the slang word for "vagina". A "penis" is called a "key", because you stick the penis in the vagina like you stick a key in the ignition
R. Kelly sings: "Let me stick my key in your Ignition, baby"
by DarkSkaners September 06, 2004
 
2.
Slang for vagina. The keys are fingers or a penis. There fore u put the key or keys in the ignition.
"Wow, i bet Caleb wants someone to put their keys in his vagina."

"Looks like Ben put the key in Julie's ignition."
by outsidethat[] March 10, 2009
 
3.
your mama's genitalia
your mamas ignition was great last night
by Ungay April 08, 2003
 
4.
A truly intangible concept. A concept that can only be drawn out by a certain festive ambience. When this collective of deranged kooks unite, there is no extent, and no limit to what can happen. There is no edge.
Some fear the second coming of Ignition, the rest are unaware of its existance.
by Looks February 25, 2003