One who spunks; usually a ratty, be-shellsuited chav type, the names of whose conquests (if known) are invariably found carved into trees, benches, parked cars an' that, just after they've been fucked.

A portmanteau of carpe diem, a Latin phrase that means “Seize the Day!” and DM, which stands for Direct Messages. This word means seizing the day via DMs.