Lyric discussion by clovus 

Cover art for Astronaut lyrics by Blitzen Trapper

I think the line is definitely:

"So if you're gonna play your games with me Better use some real CHICORY You better get smart 'cause that lock on your heart It ain't as heavy as it used to be In a land without no gravity"

It definitely sounds like he's saying "Chicory", like the flower. Wikipedia says, "It was also believed to be able to open locked doors, according to European folklore." So, it actually makes sense in terms of the lyrics too.