Let off steam. = To relax, relieve stress or to let yourself go.
After a pressure packed day, a lot of business men drink or sing Karaoke to let off steam.
Under-the-table. = To be paid an illegal way.
Since he had no work visa he was forced to work in sweatshop conditions and he was always paid under-the-table.
Jack-of-all-trades. = Someone who has a great many types of skills; someone who can do a number of jobs.
He's worked as a machinist, an accountant and a salesman. He is a Jack-of-all-trades.
Thin on top. = Loosing hair but not quite bald.
My brother is loosing his hair rapidly, he's not bald yet but he's rather thin on top.
Guzzle. = To drink a lot quickly.
The new SUV's and off road vehicles are cool, but they really guzzle gas.
Pal around with. = To associate with to meat socially but not exactly close friends.
After training I sometimes pal around with some of the other members of my club.
To get to. = To irritate, to make one upset, angry or annoyed.
He constantly taps his fingers on the table and it really gets to me.
To put someone on. = To joke around, to tell a fake tale.
Stop putting me on, Hoshino isn't going to coach the Giants.
To scrub. = To cancel, to call off or to brush well.
The space shuttles take off had to be scrubbed due to the weather.
To Get over. = To recover.
I had a terrible cold and it took me three weeks to get over it.