GDI

The abbreviation for a sexual position known as "Grab, Down, In", the position is commonly used in kinky or rough situations:
"Grab, Down, In" is basically just manhandling whoever is receiving dick and an extremely rough style of sex

'Aye bro I heard you fucked Kaylee last night and people are saying it got kinky'
'Yeah it did, it all started when Ii GDI'd her'