Swigadig 

Mostly used as a greeting or farewell. The same as someone saying "peace" or "until next time." Occasionally used for "understanding" anothers comments. The same as one saying, "it's all good." This word is used often by GreenLanturn.

"Well, I'm out. I'll talk to you tomorrow. Swigadig!"

"Swigadig! How you doing? Haven't seen you in awhile."

"Oh...so they're coming over here. Swigadig. I'll just run to the store real quick."

Swigadig by Guardian of Oa June 6, 2005

sigadig

The sound an object makes when it travels through the air, caused by whirling air and the velocity of the object itself.

Nolan threw the ball to Kevin in an angry manner. The ball was thrown so hard that it made a "sigadig" sound. Damn does Kevin's hand hurt!

sigadig by Dan Gleesac123 January 14, 2011

shigadig 

To understand, to make sense of something

Person 1: Meet me at 3pm sharp at the spot, you shigadig?

Person 2: Yea, yea, I dig.

shigadig by cutee January 28, 2008