A junior-high gym-class badminton unit resulted in 948 'shuttlecock'-based double entendres Monday, shattering the previous mark of 761. The 948 jokes, all but three delivered by boys, ranged from 'Look, I'm whacking my shuttlecock' to 'Check out the little red tips on those cocks.' Top honors went to eighth-grader Brian Fitch, 14, who ran around the gym shouting, 'Where's my cock? I can't find my cockit was here a minute ago!' followed by a long string of marginally varied quips. 