Brooklyn Nets guard DeShawn Stevenson isn't the first person to put an ATM inside his house -- in fact, DeShawn tells TMZ, he straight up jacked the idea from a big-time reality star...
DeShawn tells us, Rob Dyrdek put an ATM in his house long before he did -- and when DeShawn saw Rob's house on MTV ... the NBA star thought it was genius, so he got one himself.
We're told he paid $3,500 for the machine and lets his rich NBA friends use it for last-minute cash withdrawals before they go out.
But the service ain't free -- DeShawn says he charges his pals a steep $4.50 ATM fee.
DeShawn says the machine holds $20,000 and he refills it 4-6 times a year.
He adds, "I like doing things that aren't normal and it's cool to have."