ADJ.
behind
VERB + BEETLY
leaving, tipped-off
BEETLY + NOUN
shell
ADV.
away
adj
Resembling or characteristic of a beetle (the insect).
It felt like after sex, when the person you had been during sex had slinked away, leaving a beetly shell behind.
beetle-browed
Looked around the lounge for tipped-off creditors – one beetly glare and I would have bolted.