A business man got on an elevator. When he entered, there was a blonde already inside who greeted him with a bright, "T-g-i-f"

He smiled at her and replied, "S-h-i-t."

She looked puzzled and repeated, "T-g-i-f."

More slowly he answered, "S-h-i-t."

The blonde was trying to keep it friendly, so she smiled her biggest smile and said as sweetly as possibly, "T-g-i-f."

The man smiled back to her and once again, "S-h-i-t."

The exasperated blonde decided to explain that "T-g-i-f means - thank goodness it's Friday."

The man answered, "S-h-i-t means - sorry honey, it's Thursday."