A businessman gets on an elevator. There’s already a blonde inside. She greets him with a bright, "T-G-I-F."
He smiles at her and replies, "S-H-I-T."
She looks puzzled and repeats more slowly, "T-G-I-F."
He again answers, "S-H-I-T."
The blonde is trying to keep it friendly, so she smiles her biggest smile, and says as sweetly as possibly, "T-G-I-F."
The man smiles back to her and once again says, "S-H-I-T."
The exasperated blonde finally decides to explain. "'T-G-I-F' means 'Thank Goodness It's Friday.' Get it, duuhhh?"
The man answers, "And ‘S-H-I-T' means 'Sorry, Honey, its Thursday.'"