bomb

1 bomb /ˈbɑːm/ noun
plural bombs
1 bomb
/ˈbɑːm/
noun
plural bombs
Britannica Dictionary definition of BOMB
1 
a  [count] : a device that is designed to explode in order to injure or kill people or to damage or destroy property
— often used before another noun
b  the bomb : nuclear weapons
2 
[count] US, informal : something that is a complete failure — usually singular
3 
a  the bomb US slang : something or someone that is very good
b  [singular] British, informal : something that is very successful
4 
[count]
a  American football : a long pass
b  basketball : a long shot
c  baseball : a long home run
5 
[singular] British, informal : a large amount of money

drop a bomb

informal or drop the bomb
: to do or say something that is very shocking and unexpected
2 bomb /ˈbɑːm/ verb
bombs; bombed; bombing
2 bomb
/ˈbɑːm/
verb
bombs; bombed; bombing
Britannica Dictionary definition of BOMB
1 
[+ object] : to attack (a place or people) with a bomb or many bombs
2 
a  [no object] informal : to fail completely
b  [+ object] US slang : to fail (a test)
3 
always followed by an adverb or preposition, [no object] informal : to move or go very quickly
4 
[+ object]
a  US, sports : to hit (a ball) very hard
b  baseball : to score many runs against (a pitcher)

— bombing

noun, plural bombings
[noncount]
[count]
— often used before another noun