#Twoodle is a Twitter hashtag. The game goes like this. On Tuesday you post two words to the hashtag, then you pick from the list people have submitted to create an illustration. Then you post your illustration using the #Twoodle hashtag.
Below are two Twoodles I have contributed thus far. (As always, click to embiggen.)
Guinea Pig. Guitar. Horse. Cowboy.
Knight. Egg. Baseball. Pangolin.
(This one is a shout out to a Twain book.)