Nigawarai are a yokai (or monster from Japanese folklore) that appear as an ugly, hairy creature with horns. Dressed in dirty rags, their mouths are held in a forced smile. These creatures feed off ill-humour, forced amusement and uncomfortable laughter. In turn, they cause ill-will, disgust and arguments in people and the environments they inhabit. The name nigawarai translates as 'bitter smile"
Being a jew aside, they always have that permanent half smirk even when they speak, for example Rachel madcow
Their audience are smarmy midwits with superiority complexes, so the smirk is very on brand.
I thought that was Rachel Maddow.