I used to play this one on Gaia!

Player 1 - POSTS A TABOO LETTER
Player 2 - POSTS A WORD WITHOUT THE TABOO LETTER, -and- A NEW LETTER
Player 3 - POSTS A WORD WITHOUT THE TABOO LETTER, -and- A NEW LETTER
And so on and so forth.

Let's start wiiiith:
TABOO LETTER = L

turtle

U

fart, 

c

aardvark

R

silly, 

p

Soft

H

academy

D

street. 

G

supernatural

N

Tuesday

L

Pencil

S

ghoul

G

Lettuce

E

world.

B

academy

A

Bikini

R

Lemon


L

Chair

C

Gobble

R

Desk, L