Let's take a closer look at what they mean

To get the show on the road
To begin something right away.
Blockbuster bridge too far
A very successful movie.
Act one's way out of a paper bag (to be unable to)
Exp. To be a terrible actor.
B and B
N. (an abbreviation for "bed and breakfast")generally a home converted into a hotel which offers guests a room for the night including breakfast.
Hit the town
Exp. to go into town where all the attractions are (usually for a night of fun, dining, dancing, movies, etc.
Sleep in
Exp. To sleep later than usual
Jet lag
N. Fatique due to the time change between one's point of departure and one's destination.
Layover
N. A stop in one or more cities when traveling by air.
Grab a bite
Exp. To get something to eat.
Eyes that are bigger than one's stomach (to have)
Exp.To think one can eat more than one actually can.
Leftover
N. Remaining food that couldn't be finished.