Disney Star Billy Unger — Cops Plea in DUI Case … I Was Wet Reckless

EXCLUSIVE

Billy Unger from the Disney show “Lab Rats” … plead no contest to a lesser charge in his DUI case — keeping him out of jail as long as he toes the line. 

As TMZ first reported — Unger was nailed for speeding in Malibu back in June, but the then 18-yr-ancient also blew a .08 … which is the legal limit if you’re 21. Under Cali…