Is Gintama episode 149 filler?
Canon No, episode 149 of Gintama is canon.
#149
When Breaking A Chuubert In Half, The End With The Knob Should Be Better. It's Also Tasty To Drink From There
チューパットを二つに分ける時はあの持つトコある奴の方がなんかイイ あそこから飲むのもオツ
Aired 19 Mar 2009