The art of sticking ones penis into another penis.
Me and James leaf bagged eachother last night.
We fucked eachothers cocks. It's called leaf bagging!
Essentially the lesser version of a sandbagger. Gives no effort to anything of value in life, and fails to acknowledge warnings people give them about doing so.
Jeffrey was leaf bagging his calculus homework, and as a result he got a fifty on it. His teacher and his his parents scolded him for his poor score but he just shrugged it off and wen to his room to play Terraria.