Any amount of money earned above and beyond the expected. Examples: finding a $20 on the ground, winning money while gambling, buying something cheap and selling it at a higher price.
Money earned at work as part of salary or normal hourly wages would not be considered walking slicks. However, any additional money earned, such as a bonus, would be considered walking slicks.
Nickname given to bales of marijuana thrown overboard or out of airplanes. Origin is reportedly from members of the USCoast Guard in the area of Southern Florida.
"Base we've got some square groupers floating outside of Miami harbor."