What is a portmanteau?

Portmanteau: a word blending the sounds and combining the meanings of two others, for example motel or brunch.

Examples:

Podcast is a portmanteau, a made-up word coined from a combination of the words iPod and broadcast

Microsoft, a portmanteau of microcomputer and software

Passenger rail company Amtrak, a portmanteau of America and track

Britain’s planned exit from the European Union became known as Brexit

Implement

What portmanteaus can you think of? Can you make one up? Post one in the community!