What is the meaning of ?

grass

a weed

a herb

a scout, a spy (from the way one would hide in the grass to observe enemy troops)

pubic hair

a fake, a mimic, not the real thing

amateur, small-time

grass

a draft, a rough copy

cursive, calligraphy in a running hand

something unofficial, an informal abbreviation or knock-off

LOL

"grass", in reference to the expression w (w, LOL); LOLs

Ellipsis of 草(が)生える (kusa (ga) haeru, literally grass grows): it's hilarious

Source: wiktionary.org