Brooklyn Tankard — one of the stars of Bravo’s “Thicker than Water” — won’t be winning any Mom of the Year awards … she just got popped for allowing her kid to skip school.

Tankard — known as “Queen Brooklyn” on the show — was stopped by cops in Murfreesboro, Tennessee for a traffic offense … and a license check turned up some outstanding warrants … including one for “Failure to Cause Child to Attend School.”

According to court docs … Tankard’s 10-year-old daughter, Diamond, had 16 unexcused absences from school … and had another 35 unexcused tardies.

So they arrested Brooklyn for not forcing her kid to go to school.

She was booked and released.

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