the pants off someone

the pants off (of)

slang Thoroughly or completely; to a huge or great degree. This young team is beating the pants off the veteran squad.
See also: off, pant

the pants off someone

INFORMAL
People use the pants off after a verb such as scare, bore, or charm and before a word for a person to show that something is done to a great degree. When I was a kid, circuses bored the pants off me. Stephen Daldry is the sort of person who loves rushing around, charming the pants off everyone he meets.
See also: off, pant, someone
References in periodicals archive ?
The fear of death can be too great to bear, The prospect of finding yourself some place That you do not know, neither here nor there, Lost somewhere on the other side of space, Nothing you recognise, no friendly face, Would scare the pants off someone made from stone, All other pains boil down to this dismay.
If, however, you fancy the pants off someone and they make you laugh, then you should almost certainly marry them.
With all the engineering, mechanics and anality involved when it comes to parts, it sounds like it would bore the pants off someone as ignorant about engineering as me.