This is how I play the song. Super simple. Suggestions and corrections welcome!
F Bb F C x4
F Bb F
Marijuana makes my day
C F
Marijuana day, marijuana
Bb F
Marijuana makes my day
C F
Mari-marijuana makes my day x4
F Bb F C
(repeat till the end)
Source: https://tabs.ultimate-guitar.com/tab/panda_bear/cosplay_chords_1763890