Easier said than done
To say that something is easier said than done means that what is suggested sounds easy but it is more difficult to actually do it
Example : Put the TV aerial on the roof? Easier said than done
Easy as pie
To say that something is easy as pie means that it is very easy to do
Example : How did the English test go? – No problem – it was easy as pie
Eat one’s words
If you eat your words, you have to admit that what you said before was wrong
Example : After predicting disastrous results, he had to eat his words with the success of the new product
Excuse my French
This expression is used as an apology for using crude or offensive language
Example : He’s a bloody nuisance, if you’ll excuse my French