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Although most of these words come from the last forty years or so, it has been a trend in Japanese to create new verbs by just attaching る to nouns, contractions of nouns, or contractions of other phrases, to create new verbs. They tend to break several rules in the process, but that's what makes them ever more interesting. 

To clarify what this lesson includes, it is an exhaustive list of these words that have been made in the last 100 years or so. As such, not all of these are used. These are all generally treated as slang, so it is still best to use the expressions on the far right column. There is also differences in the frequency of these phrases depending on region.  

The most peculiar verbs of all are those that have る attached to them in slang. Below is a rather exhaustive list of these words. They are all supposed to in theory be conjugated as 一段 verbs, because they are slang involving adding る attached to a stem,  if you find a non-一段 conjugation for any of them, don't be surprised. In fact, a lot of these are 五段 verbs.

In fact, the conjugation power of many of these verbs is not to the full extant as a normal verb. That is because of their recent origin.