There are MANY internet terms, but less of them are popular. Among that list is/are:
Lolcats
This term is USUALLY applied to pictures of cats with humorous text, hence the term "Lolcats" . However, they DON'T HAVE TO include cats. Here are some examples I made.
NOTE: If you don't play Kingdom Hearts, ignore the "I pwned Riku" picture.
Lolspeak
Lolspeak is internet slang. Examples are "teh" instead of "the" and "I haz pie" instead of "I have pie" .
Abbreviations
Some examples of internet abbreviations include "ROFL" (Rolling On Floor Laughing) and LOL (Laugh Out Loud) .
Common Internet Pictures
There are MANY common internet pictures, including:
Derp Face
Troll Face
Epic Face
Non-Image Smilies
There are smilies, and non-image smilies. These include:
xD
-_-
_-_
> > O_O
O_e
T_T
X_X
:/
:
:]
:»
:«
"(
" "[
"]
#_#
*_*
?_?
!_!
★_★
☆_☆