Colloquial English Idioms

Under one's belt
If you have something under your belt, you have acquired experience or have satisfactorily achieved something. You've got to have some work experience under your belt before you can hope to get a permanent job.
Die with one's bootson			A person who dies with their boots on dies while still leading an active life. He says he'll never retire. He'd rather die with his boots on!
too big for your boots(or britches)			To say that a person is getting too big for their boots (or britches) means that you think they are behaving as if they were more important than they really are. Tom is really getting too bit for his boots since he got a promotion - he hardly says hello any more!
Hang up one's boots			When a sports player hangs up their boots, they stop playing and retire. (This expression is often used to refer to retirement in general.) Dad says he's going to hang up his boots at the end of the year.
Lick someone's boots			To say that one person is licking another's boots means that they are trying to please that person, often in order to obtain something. Sam is licking the manager's boots in the hope of obtaining a pay rise.