Bengals Safety -- Crushed Practice After Chasing Tail on Miami Beach

A little booty chasing does a body good ... at least for Bengals safety George Iloka -- 'cause the day after he hit Miami Beach with a thong'd out hot chick, he KILLED IT at practice, TMZ Sports has learned.

Iloka -- who's in the middle of a 4-year $2.1 million contract -- spent his day off (Tuesday) 1,200 miles from Cinci ... where he got in some quality ass-gazing.

But the whirlwind trip didn't affect his day job -- 'cause a rep for the Bengals tells us the 26-year-old defensive stud made it to practice the next day (Wednesday) ... and had a pretty stellar outing.