Want (something) so bad (that) (one) can taste it slang
To have a desire for something to an extreme degree
My little brother wants the art prize so bad that he can taste it.
When I reached the age of 19, I wanted a car so bad that I could taste it.
A desire to do something, which is random, sudden and unaccountable
To long for something/ to do something
Believe or act in accordance with your desires, usually in spite of the wants or feelings of others
Used to emphasize one's interest or eagerness to have or do something
The verb "want" should be conjugated according to its tense.
Children or adults often say this phrase to get their friends to join in something, especially to jump into a swimming pool (pond, lake, etc.)
“Last one in is a rotten egg!” yelled Jane, jumping into the pool.