be 21 about it

To act mature, to act as a 21 year old.

" Stop being immmture, you got to be 21 about it."

by jkk April 23, 2006

Be 21 about it

To own up to or acknowledge and accept responsibility for actions and/or wrongdoings regardless of the repercussions and opinions of others

" I already know you lying so Be 21 about it."

by URBANEDUCATEDREDNECK March 27, 2016