Other forms: selfies
If you flip your cellphone around to take a photo of yourself, you'll end up with a selfie. When you visit Paris, don't forget to take a selfie at night with the Eiffel Tower in the background!
Selfie is a true 21st-century word, coined around 2002 in Australia. This type of slang word formation — known as a hypocorism, or nickname — is incredibly popular in that country, where a mosquito is a mozzie and a present is a prezzie. By 2013, using cellphones to snap casual self-portraits was so common that the Oxford English Dictionary named selfie its word of the year.