Means 'Wear A Condom' In A Nonchallant way, so your teachers/parents/boss/anyone else you dont want to kno ur gona have sex, wont notice what your REALLY talking about.
*In The Middle Of A Test.* guy1 "so mann, i was thinkin i was gone "hang out" wit Leah tonight.
Guy2 "hey, Be Cool, Bag Your Tool."
*Teacher looks confused and walks away.*
Guy2 "hey, Be Cool, Bag Your Tool."
*Teacher looks confused and walks away.*
by ChelseyBby. February 22, 2010
This is a phrase commonly used by construction workers and contractors as a helpful reminder not to leave hardware on the ground or any other place where it could potentially harm unsuspecting co-workers. The same goes for your penis.
"Hey John. Don't leave your penis on the ground. B kool bag your tool. And don't leave that saw on the ladder either."
by Tyrone Jenkins July 31, 2006