A dirty Bit is computer lingo. When the "bit" tells the computers OS or operating system that it is about to write new data to a disk. Once the new data is being added the "dirty bit" is usually removed. a single 'bit" of memory.
When the CPU performs a cacheread/write process, the "dirty bit" is usually removed.
A guy you probably have worked with that will sleep with anything propped up on two legs with an ass (preferably when she is really really drunk). Usually will consider himself a pimp and wear Cadillac hood ornaments and have huge stupid sideburns. His fingers smell of a whore’s ass and his flat is usually decorated with stupid shit like bullhorns and other phallic trash.
Holy shit, dirtybitch took home that chicken whore and jammed his hand up her ass!