In the early 2000s there was a dive bar in Boston and people started scribbling grout puns in the grout between all the subway tiles at the urinals. It was all so brilliant, drunk poets, but I hardly remember them at this point;

Oscar the grout

Who let the dogs grout?

Twist and grout

Grout minds think alike

Etc

This was funnier in the 80’s when it first started.

that's a crazy 7. I might steal that font

Is that an F or a backwards 7