Because they held up a pair of pants.
Hold my beer while I fight this lamppost.
Hold the door! I'm a leaf on the wind!
They were selling quack in the park.
He got in treble.
Pants.
He wanted a spare in case he had a split.
They said, "baby you'd look good if you got a pair of skinny genes"
Kurt n Rod.
For holding up a pair of pants.
What's up, britches?!