This is a shortened expression of "having a time" -- So, the act of experiencing any situation--in any context-- mildly or intensely, good or bad.
"Hey, how's it going over there?"
"I'm havin' one."
"See that guy over there, passed out with his sunglasses on and a beer in his hand?"
"Oh yeah. He's definitely havin' one."
"I can't talk right now because shit totally just hit the fan, I'll call you when I'm not havin' one."
"This bar is a little weird, and these people are creeping me out... but I'm still havin' one."
"I'm havin' one."
"See that guy over there, passed out with his sunglasses on and a beer in his hand?"
"Oh yeah. He's definitely havin' one."
"I can't talk right now because shit totally just hit the fan, I'll call you when I'm not havin' one."
"This bar is a little weird, and these people are creeping me out... but I'm still havin' one."
by Lo Mayne June 6, 2019
1. The opposite of not havin a good one. 2. Not something you can just buy in a store, unless its a fuckin good one. 3. guy bro dude man bud GOODIE
ADJ. (Goodie) Hey there buddy, looks like your havin a good one? 4. A common phrase used when describing the life of a few select people. And finally....haaaaave a good one
by goodie3shoes April 2, 2011