You better watch your P’s and cross your T’s

Excellent advice given by that legal malaphor utterer, Marykathryn Kopec.  She said this to her husband, warning him about submitting a Motion to a particularly picky Judge.  It is a congruent conflation of “mind/watch your P’s and Q’s” and “dot your I’s and cross your T’s”, both meaning to pay careful attention to small details.  This mash-up has a nice rhyming ring to it.  Thanks to Marykathryn for this one!