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."