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1.
under the influence of a perscription painkiller, or powerful chemical drug.

normally used to describe the effects of Codine, various popular perscription pain relief medications, also used for describing the effects of DXM.

origin: Texas/Memphis
"i drank me 9 cups of sizzurp, im leanin!"
by cl9ud October 26, 2003
 
2.
Another word for loitering, so named because staying in one place for an extended time with no obvious legitimate reason is often accompanied by leaning on a wall or other sturdy structure.
Me and my friends were leaning outside the 7-Eleven, but after 15 minutes we spotted a squad car rolling up and knew it was time to get out of there.
by Timstuff August 31, 2009
 
3.
It's a lot different from hugging.Hugging involves arms and hands; and leaning is whole bodies moving in,leaning involves wanting and accepting.
Lucy: (to Jack) Okay, um. What do you mean by the leaning thing? You mean because he gave me flowers?
Jack: And then you *leaned*
Lucy: And then I leaned.
Jack: Yeah.
Lucy: Okay, how did I lean when I leaned?
Jack: It was a lot different from hugging. Hugging's very different. Hugging that involves arms and hands; and leaning is whole bodies moving in like this ..(leans forward suggestivley)
Jack: . Leaning involves *wanting*... and *accepting*. *Leaning*...
Joe Jr.: Hey Luce! Is this guy bothering you?
Lucy: (Laughs) No, no.
Joe Jr.: Are you sure? Because it looks like he's *leaning.*
by Deannax518 February 19, 2008