The initial idioms of the letter P

Put it in their back yard!	put it mildly
put on	put (something) on the back burner
put (something) on the front burner	put it on the line
put it to	put lead in one's pencil
put lead in pencil	put life on the line
put lipstick on a pig	put (someone or something) under a microscope
put mind at ease	put mind at rest
put mind to	put mind to it
put money up	put money where mouth is
put neck on the line	put no stock in (something)
put nose in	put nose out of joint
put nose to the grindstone	put oar in
put off by	put off stride
put off the scent	put off the track
put on (one's) thinking cap	put on a brave face