You can’t outrun this type of karma.

A homeless thug has been arrested for socking a 91-year-old Long Island pharmacy cashier during a robbery last Thursday and for a string of other heists.

Nassau County cops arrested Shaun Collins, 34, Saturday night for shoving a 60-year-old cashier to the ground at a Hicksville Walgreens Friday before fleeing with cash.

Investigators later determined that Collins was also responsible for the robbery of an East Northport Rite-Aid, during which he slugged plucky Flo Critelli in the chest. The no-nonsense nonagenarian refused medical attention after absorbing the blow and insisted on finishing her shift and driving herself home.

“I’m glad they got him,” Critelli said.