Boulder Build-Up is when someone (usually over weight men and women) have dirt and sweat
build up under or between cracks in there body from limited exersise and movement. Normally occurs under your arms, between your legs, under your
flab (fat) or in more
sever cases just in open areas. This dirt build up sometimes falls out in large chunks often named Boulder Build-Up.
Bob: "
Oh gee i really need to go to the toilet"
Bob: (mind) ill just
lif up my fat and do my
buisness.
Bob: "OMG, what is that stuff"
Bob: "I think i have Boulder Build-Up!!!"