hath someone pegged (verb) have someone's number: know someone's motives
Sinonime: blow*, blunder,
discount,
disregard, drop the ball, err, get signals crossed, get wrong, go wrong,
mess up*, misconstrue, miscount, misinterpret, misjudge, misread, misreckon, miss by a mile, misunderstand, mix up, overestimate,
overlook, overrate, overvalue, slip up,
stumble,
underestimate, underrate, undervalue
Antonime: do correctly, figure correctly,
succeed