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 again 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 finally decided to explain.

'T-G-I-F' means 'Thank God, It's Friday.' Get it, duuhhh?"

The man answered,
"S-H-I-T' means 'Sorry, Honey, It's Thursday'- - duuhhh.