any of various insectivorous plants, esp Venus's flytrap
2.
a device for catching flies
Slang definitions & phrases for fly trap
fly trap
noun phrase
The mouth (1795+) fly under the radar
verb phrase
keep a low profile: We do our best to fly under the radar of the media and professions so they don't know what hit them until it's too late, Reed told them(1990s+)