Portmanteau Words

Portmanteau words, also called blended words or simply portmanteaux, are words that are formed by splicing or merging two other words together. The term portmanteau words comes from Chapter Six of Lewis Carroll's Through the Looking Glass, and What Alice Found There, in which the character Humpty Dumpty, in explaining the meaning of the word slithy in the poem "Jabberwocky", says: “Well, slithy means 'lithe and slimy.' Lithe is the same as 'active.' You see it's like a portmanteau — there are two meanings packed up into one word." This is a double joke: first, a portmanteau is a suitcase, in which one would “pack” things, like the multiple meanings within portmanteau words; second, portmanteau is itself a compound word, similar to portmanteau words, in that it is from the French words for "carry" – porter – and "cloak" – manteau.
Portmanteau words have been invented for many different areas of life:

Entertainment

Bombay + Hollywood = Bollywood
Brad (Pitt) + Angelina (Jolie) = Brangelina
cyberspace + magazine = cyberzine
education + entertainment = edutainment
fan + magazine = fanzine
glitter + literati = glitterati
Locations

Channel + Tunnel = Chunnel
Oxford + Cambridge = Oxbridge
North (of) + Little Italy = NoLIta (area of New York City)
South (of) + Houston (Street) = SoHo (area of New York City)
Triangle + Below + Canal (Street) = TriBeCa (area of New York City)
Weather

smoke + fog = smog
Events

talk + marathon = talkathon
telephone + marathon = telethon
Government

medical + care = Medicare
parachute + troops = paratroops
Food

beef + buffalo = beefalo
breakfast + lunch = brunch
clam + tomato = Clamato
plum + apricot = pluot
tangerine + pomelo = tangelo
Place

cafeteria + auditorium = cafetorium
motor + hotel = motel
Adjective

gigantic + enormous = ginormous
man + fantastic = mantastic
Technological Equipment

camera + recorder = camcorder
breath + analyzer = breathalyzer