A bomb — an explosive device that causes destruction; used in military/criminal contexts.
駅構内で爆弾のようなものが見つかり、警察が調査している。
Something resembling a bomb was found in the station premises, and the police are investigating.
第二次世界大戦中、多くの爆弾が投下された地域がある。
There are areas where many bombs were dropped during World War II.
実験室では爆弾の取り扱いはもちろん禁止されている。
Of course, handling bombs is prohibited in the laboratory.
A colloquial term for a mixed alcoholic drink in which liquor is added (e.g., a shot dropped into a beer); a casual bar/drinking term.
今夜は友達と爆弾を何杯か飲んだ。
Tonight I had a few 'bakudan' drinks with friends.
店の名物はビールにウイスキーを入れる爆弾だ。
The specialty of the bar is the 'bakudan' — beer with whiskey added.