Interesting phrases

1) powerdisking

Watching several episodes of a TV show in a row, usually from a DVD box set. This can be done over several evenings, or a marathon weekend.

I missed the first three seasons of Mad Men, so I spent the past two weekends powerdisking all the episodes in order to be up to date for the premiere of season four later this month.

2) photobombing

Intentionally posing in other people's photos, for a later surprise. 
Usually people making funny faces in the background, without the knowledge of the main subjects of the photo.

Jim is always photobombing, he messed ups some of the best photos from the wedding.

3) mouse potato

Someone who spends all their time on the computer surfing the net or playing games. Similar to couch potato.

You spent seven hours on the internet creating meanings for words on urban dictionary? Wow, You're such a mouse potato