to do something without eating first     You shouldn’t go swimming on an empty stomach.

 a full English breakfast

a cooked breakfast, usually with bacon, sausage, eggs, mushrooms, beans, tomatoes, toast and tea
I usually have cornflakes in the morning, but on Saturdays I have a full English breakfast.

 to take a long time        

to happen slowly            
It takes a long time to learn to play the piano.

 the rush hour  

the period of time in the morning and evening when the traffic is very busy with people going to and from work             
Don’t travel by train during the rush hour. You’ll have to stand up all the way.

 a lot of fun        

very enjoyable
That party was a lot of fun.

 all over the world          

everywhere around the earth   
I travelled all over the world when I was in the military.

 (I’ll be) back in a bit        

(I’ll) return soon              
I’m just going to the shops. Back in a bit!