Lakers Big Man Ed Davis -- I'm Too HUGE For a Fly Lambo

6'10" NBA center Ed Davis is pulling a reverse Skee-Lo ... telling TMZ Sports he wishes he was a little bit smaller so he could fit into some INSANE sports cars.

Davis -- who just signed a $2 million contract with the Lake Show -- was at Paul George's Celebrity Classic in L.A. when our photog asked if he'd be breaking out the wallet to scoop up a sick Lambo in the parking lot.

"If I could fit in it, i would," Davis said ... "but it's too small man!"

Don't worry ... Davis said he had his eye on a "big boy whip" instead ... one more suitable for his ginormous frame.