The unexpected or unwanted oozing, seeping, or dripping of foul-smelling substances from a tightly clenched anus. Such substances may have been produced by the body attached to the anus or may have been introduced by another body unattached to the aforementioned anus. Such seepage may also be accompanied by an expulsion of gas (see also shart).
Made popular in the 70's and 80's, "cheekage leakage" refers to female ass cheeks protuding from the bottom of small, tight shorts. Originally this was purposeful (as was long feathered hair, camel toes, and braless terry cloth tube tops). Sometimes abbreviated to the more British "cheekage".
Cindy didn't even notice the throng of prepubescent boys skating avidly behind her at the roller rink.
"Dude," Chad gasped, "if those cut-offs creep up any further her cheekage is going to make me shoot!"
Paul was hypnotized by the cheekage leakage Mrs. Tyler had on display across the street. Bending over to prune her roses, her tan lines would appear and disappear provocatively.