猿ぐつわ, 口かせ
a piece of cloth put in or over a person's mouth to prevent them from speaking
ギャグ, 冗談
a joke or trick
猿ぐつわをはめる, 口を封じる
to put a gag on (a person) to prevent them from speaking
吐き気をもよおす, むせる
to choke or retch