An Irishman says:

 

of a coarse, ill-mannered person using poor language
What would you expect out of a pig but a grunt?

of one who overstays their welcome
If that man went to a wedding, he'd stay for the christening.

of a person who paid too much for a cow
He bought every hair in her tail.

of a clever thief
He'd steal the sugar out of your punch.

in praise of strong whiskey
I felt it like a torchlight procession going down my throat.

of bad aim in shooting
He wouldn't hit a hole in a ladder.

of an impish child
That one suffers from a double dose of original sin.

of an unfortunate one
He is always in the field when luck is on the road.

of very wet weather
It's a fine day for young ducks.

Also:

There’s no point in keeping a dog if you are going to do
your own barking.

If you want praise, die. If you want blame, marry.

Lie down with dogs and you’ll rise with fleas.

Pity him who makes an opinion a certainty.

No two people ever lit a fire without disagreeing

There’s nothing so bad that it couldn’t be worse.

May your home always be too small to hold all your friends.
The person bringing good news knocks boldly on the door.

It is better to spend money like there's no tomorrow
than to spend tonight like there's no money!