drop in 「on a person [at a person's house]
人[人の家]をひょっこり訪ねる
drop into a chair
どさっといすに座る
drop into silence
黙り込んでしまう
Drop me (off) somewhere near the station.
駅近くのどこかに降ろしてください
drop me a line [a line to me]
一筆お便りください
drop one's aitches
語頭のh音を発音しない(◆無教養の印とされる)
drop one's speed by ten kilometers
速度を10キロ落とす
drop [pack on] pounds
やせる[太る]
drop the amount of junk mail
迷惑メールの量を減らす
drop the price of the product by 25%
商品の価格を25%下げる