In raving or glowsticking, it is the act of "tracing" your body in different ways, stomach tracing is the act of tracing your stomach. There are all different ways such as tracing legs, arms, or head.

v. collectively or individually finding someone/something to blame for a problem, as opposed to brainstorming which connotes finding solutions to a problem

n. the act of finding someone/something to blame for a problem

(from a TV ad for HD television)