drop one's guard

Let defenses down

To drop one's guard is to relax vigilance or become less defensive, leaving oneself vulnerable.

From boxing, where lowering protective hands exposes the face to punches.

The phrase usually describes emotional or psychological openness: She rarely drops her guard around strangers.

It can also mean becoming careless about potential threats: Don't drop your guard just because things are going well.

Related

miscalculation · bare · defenselessness · moment of weakness · exposure · complacency · danger · overconfidence · ambush · sneak attack · negligence · smile · melt · unpreparedness · taken by surprise · lower · error · underestimation

Opposites
vigilance/alertness

drop one's guardstay alert

Maintain active awareness

keep one's guard up · keep watch · be on the lookout · keep one's eyes open · stay sharp

emotional openness/defensiveness

drop one's guardkeep one's guard up

Remain watchfully protective

keep one's distance · hold back · clam up

Family

drop, drops, dropped, dropping, dropper, droplet, ones, guard, guards

Familiarity
Top 100,000
Profile
Known to kids · Used worldwide · Timeless · Everyday, not technical · Rated G