Is it 'off head', 'off hand' 'off pat' or 'by heart'?

I love all the new students in my class.
You guys are awesome by the way. 😀😀

Today. I want to give you a better expression for saying that 'you know something very well'.

#Offhead? There is nothing like offhead.

'I know it off head' is wrong.

#Offhand?

What does offhand mean?

It mean without previous thought or consideration. Just like saying 'on the spur of moment' , 'immediately', 'spontaneously'.

So, do you just know something offhand?

No...not at all.

You can say something offhand, do anything offhand but then it seems weird to say
' I know the answer offhand'.
It is normal 'to say the answer offhand'.

Do you get my drift?

People don't know anything spontaneously, rather, they  say what they already know, spontaneously.

Now to the final expression

#HaveSomethingOffPat?

It means to know something or be able to do something perfectly; be perfect master of something .

So rather than say, I know it offhand, you say I have it off pat.

Americans would say, 'I have it down pat' .

I have many Christmassy songs off pat.....correct

I know many Christmassy song offhand(spontaneously) ... Biko, are you a magician? LOL ...not so correct.

#offheart is wrong

You say (off) by heart

You learn or know something by heart too.

Oya ngwa...all of you should go for evening service. Teacher is tired.

By the way, listen

While growing up, mum would be like
"When you get back from church you better have the passages of the bible the priest mentioned off pat. If not, agbam gi ose.'....