The initial idioms of the letter P

Promises, promises!	Promises are like piecrust, made to be broken
promote	prone to
pronounce on	pronto
Received Pronunciation	proof
proof is in the pudding	proof of the pudding, the
proofed	prop
prop up	prop up the bar
proper	prophet
prophet is not without honor save in his own count	proportion
propose	propose a toast
propose to	props
pros and cons	prospect for
prospect	prosper from
prosper	prostie
prostrate oneself before	prosty