i worked for Italians as a chef/sous chef/all of it for many years in professional kitchens...fongul you bring the left hand to the part of your right arm bend where they take blood or shoot heroin. in my experience. maybe it's been attenuated for the younger generations.
fongul is a double move. the single arm **** you has what we call a peace sign turned backwards. like in the UK.
i didn't understand that "doing Shedeur" pic either. but i'm 57. and i'm not an NFL guy. and it's really one of things i can live with not knowing.