IDIOM ►

left on third base

Meaning 1
In baseball their are four bases, 1st, 2nd, 3rd, and 4th. Fourth base is home; if a runner gets to 4th base he scores a run. If the runner is left on third base at the end of an inning, there is no score.
Sentence 1
The batter scored a double and then stole third, but when the inning was over, he was still on third, so no run was scored for his team.
Meaning 2
To try, but not score.
Sentence 2
The young boy asked his date to the prom. He really liked her and had dated her for awhile, but the captain of the football team asked her to the prom, so the boy didn't score with her.