We found 2 dictionaries that define the word let his guard down:

General (1 matching dictionary)

1. let his guard down: Merriam-Webster

Slang (1 matching dictionary)

2. Let His Guard Down: Urban Dictionary

▸ Words similar to let his guard down ▸ Usage examples for let his guard down ▸ Idioms related to let his guard down ▸ Wikipedia articles (New!) ▸ Words that often appear near let his guard down ▸ Rhymes of let his guard down ▸ Invented words related to let his guard down