Code for chill and smoke. Used in a public situation when asking if someone wants to smoke weed with you. Can also be used as slang for intense party usually with lots of smoking and drinking.
Co worker: yo man you wanna hang out friday night?

You: unreasonably late?

Co worker: damn straight

ex 2
yo man still stoned from that unreasonably late night yesterday...

Ya man that shit was ill
by Uknowweballin February 24, 2011
Get the Unreasonably Late Night mug.