Большой русско-английский фразеологический словарь

П149

ПРОГЛОТИТЬ (СЪЕСТЬ) ПИЛЮЛЮVPsubj:humanto endure an offense or insult without protest

X проглотил пилюлю = X swallowed (pocketed) the insult (the digetc)
X just took itX took it lying down.