A key witness for former President Donald Trump in his criminal hush money trial Monday stuck out his tongue and blew raspberries when faced with rulings from the judge overseeing the case, according to a new report. Attorney Robert Costello partook in this gesture more commonly expressed by infants — and which can mimic the sound of flatulence — after a frustrated Justice Juan Merchan sustained several objections from Manhattan District Attorney’s office prosecutors, according to a Newsweek report. ALSO READ: ‘Most transparent president’ Trump won’t meet financial transparency deadline. Again…