Answer: fraternize

AnswerCrossword Clue
FRATERNIZEHang out
FRATERNIZEAssociate with.
FRATERNIZEBe chummy with.
FRATERNIZEBuddy up with
FRATERNIZEConsort
fraternizeto associate or mingle as brothers or on fraternal terms
fraternizeAssociate or form a friendship with someone, esp. when one is not supposed to