To solemnly pledge to undertake an action
vow
"Here's a little song I wrote, you might want to sing it note for note"
"Don't Worry, Be Happy"
To deplete something's energy or weaken it gradually
sap
"It's the thrill of the fight, rising up to the challenge of our rival"
"Eye Of The Tiger"
To clear a pool table by hitting all the balls in the pockets in a row
run
"There's a choice we're making, we're saving our own lives, it's true we'll make a better day, just you and me"
"We Are The World"
To tell an insignificant or childish lie
fib
Did you ever know that you're my hero? & everything I would like to be, I can fly higher than an eagle, for you are the... "
"Wind Beneath My Wings"
To add additional unjustified expenses to an account
pad
"You know I feel so dirty when they start talking cute, I wanna tell her that I love her but the point is probably moot"
"Jessie's Girl"