What is Flower Picking?
1.
basically, it means grabbing
Joe: Hey man, what'd you do saturday night?
John: Me and some homies went to flower picking.
Joe: NICE! How were they?
John: Double D baby
See
2.
Pinching the nipple of a female and pulling hard.
Dude i was going flower picking the other day and this one chick's nipple just popped out.