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.