Lyric discussion by shedboy82 

Cover art for Chewing Chewing Gum lyrics by Super Furry Animals

Heard this song is about drugs - namely, lying in bed in a drud-addled state and regretting it. Seems a bit too literal for me. I'd say it's more general, about confronting your demons ('I've got stuff on my mind') head on and not letting your problems (symbolised by the gum) overwhelm you ('You might wake up with it stuck in your hair').