The initial idioms of the letter M

member	get the memo
memory	memory lane
Men are blind in their own cause	men in blue
Men make houses, women make homes	man of God
man of letters	man of the cloth
man of the world	ménage
ménage à trois	mend fences
mend one's fences	mend one's ways
mend ways	mend
men	mensch
mental block	mental giant
mental midget	mentality
mental	mention in
mention in passing	mention to
mention	merchandise