known as `` wilt the stilt '' and `` the big dipper , '' the outspoken , 7-foot-1 mr. chamberlain had a presence wherever he went , from his birthplace of philadelphia to boca raton , where he could be spotted this decade playing polo and tennis , commentating at slam-dunk contests at florida atlantic university , and strolling through the glades road restaurant he and business partners opened in 1990 .