Lyric discussion by HowardTCo 

Cover art for Cloisonné lyrics by They Might Be Giants

I feel like the song is sung from the perspective of a criminal of some sort.

"Don't go calling law enforcement,"

"Keep your voice down,"

Sleestaks might be a metaphor for goons/henchmen types.

Sleestak could be cops too I guess now that I think about it.