Piker - Definition and Overview

A piker is a person who bets or gambles with small amounts of money; a cheapskate.

In more modern Internet parlance, a piker is someone who writes short and often seemingly irrelevant messages or posts on an internet forum or message board, generally for the sole purpose of increasing the individual's post count. This practice is largely frowned on by most moderators and message board communities.

Modern Australian slang. Someone who is invited to an event or outing, who confirms their forthcoming engagement but never actually attends. Also, one who attends an event but leaves early in proceedings. ie."You're not piking already are you?"

Also: a shirker, avoiding doing ones fair share.