The meaning of the Acronym OG is...

OG is

• Zero Gravity
• Oxygen Gage
• Outer Gimbal (Roll)

More Meanings For OG:

• Oracle Graphics
• Original Gravity
• Organic Gardening
• Optimal Guess
• Observational Game
• Orientation Group
• Original Girl
• Old Gold
• Ole Grey
• Orange Gatorade
• Organically Grown
• Online Gaming
• Original
• Old Guyor
• Order Of Gownsmen

OG is also in:

• Adults
• Astronomy
• Botany
• Colors
• Databases
• Food
• Hobbies
• Mathematics
• Physics
• Unfiled