What is Twencen?
1.
A reference to indicate that something is out-of-date or old-fashioned. TwenCen is an abbreviated way of saying Twentieth Century.
Your landline is so TwenCen!
See
2.
Twentieth Century
"Landlines are so TwenCen."
See
3.
Twentieth Century
Your phone is so TwenCen
See