Lamar Odom -- I'm Dumping The Ol' Bag

Lamar Odom is living the life of a vagabond ... never staying in one place too long. Latest stop -- a friend's home.

Lamar dropped off a fully-packed suitcase at a pal's house in L.A. on Wednesday -- which also happened to be his 34th birthday.

TMZ broke the story ... Lamar and Khloe Kardashian are secretly selling their Tarzana mansion -- although Lamar hasn't lived there for months -- and Khloe plans to divorce Lamar once she thinks his life is stable enough to handle it.

Lamar took a momentary break from his baggage handling to flex his reduced muscles.