fold a flopped flush here??

[ob1]

2/5 nl at Tropicana game full of spewy donkeys- mostly older. I have been playing very lag- about 60 percent of flops i am seeing with a raise about 40 percent of the times i take the flop .. everyone else always limps and sticks to flops like glue. effective stacks are about $800.
Any way i have 8 [img]/images/graemlins/club.gif[/img] 4 [img]/images/graemlins/club.gif[/img] in SB 2 limpers.
Flop comes k62 all clubs i lead for size of pot (20 bucks)
shortstack moves in for 100 more, crazy guy flat calls, i make it 400 he moves in for 375 more, other short stacker calls for about 200. 350 more to me.. i ???? OBV. someone else has flopped bigger flushes but the side pot with the maniac is big so that is all that i am worried about. - What is my line here??