An investigation at New Jersey's Monmouth University is underway after an antigay sign was used to taunt a men's basketball player.During a Friday game at the OceanFirst Bank Center in West Long Branch, N.J., a group of male MU students held several signs with printouts of photographs from a Siena College player's Tinder profile."Stick to Grindr," read a large whiteboard accompanying the signs, a reference to the hookup app popular with gay and bi men.