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CTN means can't talk now used when your doing something important.
1.Wanna go for a beer?
CTN bro.
Okay

2.Dude wanking
Hello wuu2
CTN
Okay then
by Don Chellz January 04, 2012
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3
ctn = cannot talk now
This is an abbreviation used by people having blowjob while messaging on internet
Bob: Hey whats the English HW?
Chad: CTN, i'm getting a blowjob
Bob: Turn on your camera then and lemme see
by Bob Dole January 03, 2005
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