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 December 17, 2015

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 04, 2006