Weak Will

Weak Will is one of Fallout GURPS disadvantages. See: Fallout GURPS.

Overview
"You are easily persuaded, frightened, bullied, coerced, tempted and so on. For every level taken, your IQ is effectively reduced by 1 whenever you make a Will roll, including attempts to resist distraction, seduction, torture, mind control and so on. Weak Will also affects all attempts to master phobias and avoid giving in to mental problems."

- Steve Jackson Games GURPS sources

In Fallout
With the abandonment of GURPS, Weak Will was removed from the game