Top definition
TTCN = Time To Cellphone Number

Is common benchmark how long it takes to get a girls cellphone number without explicit asking her for it - as she is giving it to you. Wide spread on German rides with students and other peoples you never met before.
A: What was your shortest TTCN?
B: Well, after a ride from Berlin to Munich it took 3 hours of flirting until she gave it to me
by pavement_five June 11, 2011
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