勝手にしろ: go to hell!, have it your way!

see you later (said by a person leaving, a stock phrase required by the Japanese etiquette, lit.: (after) going, I will come back)

口蹄疫: foot-and-mouth disease (FMD)

壊滅的: devastating, catastrophic

氷点下: below freezing, sub-zero

哲学者: philosopher

地下鉄道: (rail transport) subway, metro, underground (abbr. 地下鉄)

慢性的: chronic

天然痘: (medicine, pathology) smallpox

be flustered, be in a panic, be in all directions at once