When you use an expression such as a problem and a half or a meal and a half, you are emphasizing that your reaction to it is either very favourable or very unfavourable.
[emphasis]
Teaching Jason to kick the ball, that was a job and a half.
See full dictionary entry for half
Examples of 'and a half' in a sentence
and a half
Of the nine days of the evacuation, the Luftwaffe only had two and a half days of clear flying conditions.