They worry that something they say or do will make others laugh at them.
VOA: special.2009.11.17
Even if it is merely being able to successfully predict whether that joke we are thinking of telling will makeotherslaugh or just embarrass us instead.
Contrary to his somber popular image -- created in the early days of Beatlemania and never truly put to rest -- George Harrison loved to laugh, and he loved to makeotherslaugh.