Four letter word

We have a jar on the counter for tips, should the fancy take someone to express their happiness with our service through the medium of loose change.

It's there more in hope than expectation.

This is how we advertise it:

which, of course, leads to some scrabbling. There's not a great deal of choice, given there are only four letters, but quite a few have a go.

This is typical:

As is this (usually accompanied by a schoolboy guffaw):

But this week someone came up with a NEW one. 

After nearly five years of PITS and SPIT someone thought out of the box:

Clever and appropriate. 

And he even dropped a coin in the jar.