1. Conditional, based upon time, event, or circumstances.

2. Slang, specific to junk mail advertising lotteries and sweepstakes to persuade as many duh-weebs as possible who haven't even entered a sweepstakes that they have already won: "if".
1. When you finish your chores, you may play; when it's dark, come inside.

2. You are guaranteed to win at least $250,000 when you return the winning number to us. (The fact that the recipient does not have the winning number, so he may as well go fly a kite, is not expressed.)
by Downstrike October 18, 2004
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A fantastic album created in 2011 by an alternative rock band called Incubus. Ever changing, these musicians have changed my whole existence vastly.
Switchblade, In the Company of Wolves, Thieves

"Incubus lost there metal edge dude!!" "Your a fool, listen to If Not Now, When? and tell me that aint ghood you clown.
by TheSaga January 2, 2012
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to tell someone to get a pc in fewer words
ex: trig pc when
by invisible lock May 20, 2020
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The act of knowing an idea, concept or abstract thought with utmost, absolute confidence. It is usually followed by a repetitive forward finger wag while raising your eyebrows in a lateral motion.
Little Arturo! Are you going to drink tonight? Alejandro.... When you when you!
by Carlos3leches March 11, 2017
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What Tom (god) says (Tombstone)

Basically, this is a subtle nod to the famous epic movie of a spaghetti western namedTombstone, when the titular Doc Holiday says "Say when"
Tom: "Hey Dayveeitd."
Davit: "Yeah??????"
Tom: "I got a good one-uh."
Dayveit: "Okay...?"
Tom: "I'M DOC HOLIDAY Say When!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!" ;3
David: *walks awayuhn XD*
by Hilfred Steelhelm May 30, 2020
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when i
when i
by AshtyBoi September 6, 2021
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