Strap: To work closely and energetically (at a task); to buckle to one's work. Also with adverb, as to, away. slang. [OED]

Meaning unknown

Eat

Worthless ideas, discourse, or writing; nonsense

A person or thing of extraordinary excellence.

Investors

A form of elevated monorail where the vehicle is suspended from a fixed track (as opposed to a cable used in aerial tramways.)They were the brainchild of Henry Robinson Palmer (1795-1844). The first suspended railway was opened at Cheshunt on June 25, 1825 using Palmer's patent. It was built to carry bricks, but as an opening stunt it carried passengers.

Reference
http://en.wikipedia.org/wiki/Suspension_railway

Chimney sweeper - One whose business it is to sweep chimneys, in order to remove the soot [OED]

“Chimney Sweepers” from Costume of the Lower Orders of London, designed and engraved from Nature by T.L. Busby”, 1820.
depicts a London sweep in company with his climbing boy. They carry short brushes, a scraper, blankets for the removal of soot and they are ragged and dusty. 

Swell: Stylishly or handsomely dressed or equipped; of good (social) position; of distinguished appearance or status.

Stylishly or handsomely dressed or equipped; of good social position; of distinguished appearance or status [OED]

Swell: One who is stylishly or handsomely dressed or equipped; of good (social) position; of distinguished appearance or status.